Final answer:
The statement is true; the centroid of a triangle is the point that lies 2/3 of the way from each vertex to the midpoint of the opposite side. The centroid is the same point for all three vertices, which can be shown using vector operations that equate to (A+B+C)/3 for a triangle with vertices A, B, and C.
Explanation:
The statement that points lying 2/3 of the way from a vertex to the midpoint of the opposite side for any triangle in ℝ² (the real number plane) are all the same point, and this point is called the centroid of the triangle, is True. To prove this, consider a triangle ABC with vertices A, B, and C. If M is the midpoint of side BC, N is the midpoint of side AC, and O is the midpoint of side AB, then the points two-thirds of the way from the vertices A, B, and C to the midpoints of the opposite sides, respectively, can be represented by the vectors (2M+A)/3, (2N+B)/3, and (2O+C)/3.
Applying the midpoint formula and vector addition, we find that these points are equivalent to (B+C)/3, (A+C)/3, and (A+B)/3 respectively, which, when simplified, all yield to (A+B+C)/3, illustrating that the points coincide and thus prove the existence of a single centroid.
In a geometric context, the centroid is the point where the triangle’s medians intersect, and it also serves as the triangle's center of mass. The centroid divides each median in a 2:1 ratio, with the larger portion being closer to the vertex. This property is intrinsic to triangles and can be demonstrated using vector algebra or geometric arguments.
PLZ HELP ME ASAP!!!!!!
WHAT I CHOOSE IS IT THE RIGHT ANSWER????
Answer:
YES!!!
Step-by-step explanation:
Answer:
Your answer is going to be C
Step-by-step explanation:
So, when it is on the top, your X will always be first and you can see it is not in the negatives. When it is on the bottom Y is first and you can see it is in the negatives.
Suppose a room is 5.2 m long by 4.3m wide and 2.9 m high and has an air conditioner that exchanges air at a rate of 1200 L/min. How long would it take the air conditioner to exchange the air in the room
Answer:
54 minutes
Step-by-step explanation:
From the question, we are given;
A room with dimensions 5.2 m by 4.3 m by 2.9 mThe exchange air rate is 1200 L/minWe are required to determine the time taken to exchange the air in the room;
First we are going to determine the volume of the room;
Volume of the room = length × width × height
= 5.2 m × 4.3 m × 2.9 m
= 64.844 m³
Then we should know, that 1 m³ = 1000 L
Therefore, we can convert the volume of the room into L
= 64.844 m³ × 1000 L
= 64,844 L
But, the rate is 1200 L/min
Thus, time = Volume ÷ rate
= 64,844 L ÷ 1200 L/min
= 54.0367 minutes
= 54 minutes
Therefore, it would take approximately 54 minutes
plz, help ASAP!!!!!!!!!!
the options are
reflection across the x-axis or y-axis
and then a translation 4 units down, up, right left
Answer:
Reflection over the x-axis and translation 4 units left
Step-by-step explanation:
Jimmy Carter's family went apple picking they picked a total of 115 apples, the family are a total of eight apples each day after how many days they have 19 apples left
I do not understand this question please help picture attached Which graph represents the function?
f(x)=x+2−−−−√3
the answer is (-2,0)
Perform the following facility capacity problem. In planning the opening of your restaurant, you estimate that the restaurant's total area should allow each customer 20 square feet of dining space. Of the planned space, you hope to utilize one-third of the total space for the kitchen and storage. Seating capacity = 90 Area of dining room = a0 sq. ft. Area of kitchen and storage (to the nearest sq. ft.) = a1 sq. ft.
Answer:
Step-by-step explanation:
Total area = Dining space + Kitchen and Storage space
Dining space = 90 multiplied by 20 = 1800 square feet
Kitchen and Storage space = 1/3 of Total area
Total area = 1800 + 1/3 of Total area
(1-1/3) Total area = 1800
2/3 Total area = 1800
Total area = 3*1800/2 = 2700
Kitchen and Storage space = 2700*1/3 = 900 square feet
Functions f(x) and g(x) are defined below.
Determine where f(x) = g(x) by graphing.
A.
x = -1
B.
x = 4
C.
x = -4
D.
x = -2
Answer:
C. x = -4
Step-by-step explanation:
Graphing calculators make solving a problem like this very easy. The two functions both have the value -1 at x = -4.
The solution to f(x) = g(x) is x = -4.
When playing the 10 number game, we can use 1, 2, 3, 4, 5, 6, 7, 8, 9, 10(each number only one time), addition, multiplication, and parentheses. What is the largest number that we can create the 10-number game
After driving to a riverfront parking lot, Bob plans to run south along the river, turn around, and return to the parking lot, running north along the same path. After running 3.25 miles south, he decides to run for only 50 minutes more. If Bob runs at a constant rate of 8 minutes per mile, how many miles farther south can he run and still be able to return to the parking lot in 50 minutes?
(A) 1.5
(B) 2.25
(C) 3.0
(D) 3.25
(E) 4.75
Answer:A) 1.5
Step-by-step explanation: Bob runs at the rate of 8mins per mile
In 60mins his rate would be=60/8=7.5
Let a be the distance he further runs south
2s+3.25
Total distance covered in 50mins=Time=distance/speed=
50/60
50/60=2s +3.25/7.5
Cross multiply
60(2s+3.25)=50×7.5
120s+195=375
120s=375-195
S=180/120
S=1.5
A new drug on the market is known to cure 24% of patients with colon cancer. If a group of 15 patients is randomly selected, what is the probability of observing, at most, two patients who will be cured of colon cancer? 15 choose 2(0.24)2(0.76)13 15 choose 0(0.76)15 + 15 choose 1(0.24)1(0.76)14 + 15 choose 2(0.24)2(0.76)13 1 − 15 choose 2(0.24)2(0.76)13 15 choose 0 (0.76)15 1 − 15 choose 0 (0.76)15
Answer:
P = ₁₅C₀ (0.76)¹⁵ + ₁₅C₁ (0.24)¹ (0.76)¹⁴ + ₁₅C₂ (0.24)² (0.76)¹³
Step-by-step explanation:
Binomial probability:
P = nCr pʳ qⁿ⁻ʳ
where n is the number of trials,
r is the number of successes,
p is the probability of success,
and q is the probability of failure (1−p).
Here, n = 15, p = 0.24, and q = 0.76.
We want to find the probability when r is at most 2, which means r = 0, r = 1, and r = 2.
P = ₁₅C₀ (0.24)⁰ (0.76)¹⁵⁻⁰ + ₁₅C₁ (0.24)¹ (0.76)¹⁵⁻¹ + ₁₅C₂ (0.24)² (0.76)¹⁵⁻²
P = ₁₅C₀ (0.76)¹⁵ + ₁₅C₁ (0.24)¹ (0.76)¹⁴ + ₁₅C₂ (0.24)² (0.76)¹³
The correct answer is When P = ₁₅C₀ (0.76)¹⁵ + ₁₅C₁ (0.24)¹ (0.76)¹⁴ + ₁₅C₂ (0.24)² (0.76)¹³
The first step is Binomial probability:P = nCr pʳ qⁿ⁻ʳ
Also, that where n is the number of trials,After that r is the number of successes,p is the probability of success, and also that q is the probability of failure (1−p).So that Here, n = 15, p = 0.24, and q = 0.76.
The second step is We want to find the probability when r is at most 2, which were means that the r = 0, r = 1, and r = 2.When P = ₁₅C₀ (0.24)⁰ (0.76)¹⁵⁻⁰ + ₁₅C₁ (0.24)¹ (0.76)¹⁵⁻¹ + ₁₅C₂ (0.24)² (0.76)¹⁵⁻²After that P = ₁₅C₀ (0.76)¹⁵ + ₁₅C₁ (0.24)¹ (0.76)¹⁴ + ₁₅C₂ (0.24)² (0.76)¹³Learn more information:
https://brainly.com/question/19535812
Match the vocabulary word with the correct definition. 1. an angle in the plane of a circle with the vertex at the center of the circle central angle 2. the union of the endpoints of a diameter and all points of the circle lying on one side of the diameter. minor arc 3. the union of two points of a circle, not the end points of a diameter; and all points of the circle that are in the exterior of the central angle whose sides contain the two points. major arc 4. the union of two points of a circle, not endpoints of a diameter, and all points of the circle that are in the interior of the central angle whose sides contain the two points semicircle
Answer:
1. central angle
2. semicircle
3. major arc
4. minor arc
Step-by-step explanation:
1. central angle is an angle whose vertex rest on the center of a circle, with its sides containing two radii of the same circle.
2. semicircle is simply a half circle which is formed by cutting a full circle along a diameter (that is union of the endpoints of a diameter).
3. major arc is an arc that is larger than a semicircle and is bounded by a central angle whose angle is lesser than 180°.
4. minor arc is an arc that is smaller than a semicircle and is bounded by a central angle whose angle is greater than 180°.
Answer:
major arc
1
the union of two points of a circle, not the end points of a diameter; and all points of the circle that are in the exterior of the central angle whose sides contain the two points.
2. central angle
the union of two points of a circle, not endpoints of a diameter, and all points of the circle that are in the interior of the central angle whose sides contain the two points
3. semicircle
the union of the endpoints of a diameter and all points of the circle lying on one side of the diameter.
4. minor arc
an angle in the plane of a circle with the vertex at the center of the circle
Step-by-step explanation:
A countrys population in 1995 was 173 million in 1997 it was 178 million estamate the population in 2005 using the expontial growth formula round your awser to the nearest million
Answer: the population in 2005 is
199393207
Step-by-step explanation:
The formula for exponential growth which is expressed as
A = P(1 + r/n)^ nt
Where
A represents the population after t years.
n represents the periodic interval at which growth is recorded.
t represents the number of years.
P represents the initial population.
r represents rate of growth.
From the information given,
P = 173 million
A = 178 million
t = 1997 - 1995 = 2 years
n = 1
Therefore
178 × 10^6 = 173 × 10^6(1 + r/1)^2 × 1
178 × 10^6/173 × 10^6 = (1 + r)^2
1.0289 = (1 + r)^2
Taking square root of both sides, it becomes
√1.0289 = √(1 + r)^2
1 + r = 1.0143
r = 1.0143 - 1 = 0.0143
Therefore, in 2005,
t = 2005 - 1995 = 10
A = 173 × 10^6(1 + 0.0143)^10
A = 173 × 10^6(1.0143)^10
A = 199393207
A twelve-hour clock is set at the correct time on the afternoon of May 17th. Somebody knocked the clock off the wall and now it loses 6 minutes per day. How much time will the clock be behind 3 weeks later?
1 hour and 42 minutes
2 hours and 6 minutes
3 hours and 12 minutes
2 hours and 36 minutes
Answer:
2 hours and 6 minutes. Second option
Step-by-step explanation:
Proportions
If two variables are proportional, it's easy to find the value of one of them knowing the value of the other and the proportion ratio. We know that each day our clock loses 6 minutes per day. It gives us the ratio between time lost vs days passed.
Three weeks (21 days) from now, from now, the clock will be behind a total time of 6 * 21 = 126 minutes.
Two hours are 120 minutes, thus the time behind is 2 hours and 6 minutes. Second option
The clock will be behind 3 weeks later by 2 hours and 6 minutes.
Explanation:To find out how much time the clock will be behind 3 weeks later, we first need to calculate the total amount of time the clock will lose in 3 weeks. Since the clock loses 6 minutes per day, we can multiply this by the number of days in 3 weeks (21 days). 6 minutes per day x 21 days = 126 minutes.
Next, we convert the minutes into hours and minutes. There are 60 minutes in an hour, so we divide the 126 minutes by 60 to get 2 hours and a remainder of 6 minutes.
Therefore, the clock will be behind 3 weeks later by 2 hours and 6 minutes.
Ros is trying to find the solution(s) to the system {f(x)=−x3+2x2+x−2g(x)=x2−x−2.
Roz wants to find the solution(s) to this system. After analyzing the graph of the functions, Roz comes up with the following list ordered pairs as possible solutions: (0,−2), (2,0), and (−1,0).
Which work correctly verifies whether each of Roz’s ordered pairs is a solution?
A. A solution to the system will be the intersection of f(x) and g(x) such that f(x)=g(y). Roz must verify one of the following: f(0)=g(−2) and f(−2)=g(0); f(2)=g(0) and f(0)=g(2), or f(−1)=g(0) and f(0)=g(−1).
1. f(0)=−03+2(02)+0−2=−2; g(−2)=(−2)2−2−2=0 Thus, (0,−2) is a solution.
2. f(2)=−23+2(22)+2−2=0; g(0)=02−0−2=2 Thus, (2,0) is a solution.
3. f(−1)=−(−1)3+2(−1)2+(−1)−2=0; g(0)=02−0−2=2 Thus, (−1,0) is not a solution.
B.A solution to the system will be the intersection of f(x) and g(x) such that f(x)=g(x). Roz must verify that f(0)=g(0)=−2, f(2)=g(2)=0, and f(−1)=g(−1)=0 as follows:
1. f(0)=−03+2(02)+0−2=−2; g(0)=02−0−2=−2 Thus, (0,−2) is a solution.
2. f(2)=−23+2(22)+2−2=0; g(2)=22−2−2=0 Thus, (2,0) is a solution.
3. f(−1)=−(−1)3+2(−1)2+(−1)−2=0; g(−1)=(−1)2−(−1)−2=0 Thus, (−1,0) is a solution.
C. A solution to the system will be the intersection of f(x) and g(x) such that f(x)=g(x). Roz must verify that f(−2)=g(−2)=0, and f(0)=g(0)=2 or f(0)=g(0)=−1 as follows:
1. f(−2)=−23+2(22)+2−2=0; g(−2)=(−2)2−2−2=0 Thus, (0,−2) is a solution.
2. f(0)=−03+2(02)−0+2=2; g(0)=02−0−2=2 Thus, (2,0) is a solution.
3. Since f(0)=g(0)=2, f(0) and g(0) cannot equal −1. Thus, (−1,0) is not a solution.
D.A solution to the system will be the intersection of f(x) and g(x) such that f(x)=g(x). Roz must verify that f(−2)=g(−2)=0, and f(0)=g(0)=2 or f(0)=g(0)=−1 as follows:
1. f(−2)=−23+2(22)+2−2=0; g(−2)=(−2)2−2−2=0 Thus, (0,−2) is a solution.
2. f(0)=−03+2(02)−0+2=2; g(0)=02−0−2=2 Thus, (2,0) is a solution.
Since f(0)=g(0)=2, f(0) and g(0) cannot equal −1. Thus, (−1,0) is not a solution.
Answer:
B. A solution to the system will be the intersection of f(x) and g(x) such that f(x)=g(x). Roz must verify that f(0)=g(0)=−2, f(2)=g(2)=0, and f(−1)=g(−1)=0.
Step-by-step explanation:
In order for f(x) = g(x) to have a solution the same values of x and y must satisfy both ...
y = f(x)y = g(x)This will be the case for (x, y) = (-1, 0) or (0, -2) or (2, 0).
Ros can show this using the steps offered in answer choice B:
1. f(0)=−0^3+2(0^2)+0−2=−2; g(0)=0^2−0−2=−2. Thus, (0,−2) is a solution.
2. f(2)=−2^3+2(2^2)+2−2=0; g(2)=2^2−2−2=0. Thus, (2,0) is a solution.
3. f(−1)=−(−1)^3+2(−1)^2+(−1)−2=0; g(−1)=(−1)^2−(−1)−2=0. Thus, (−1,0) is a solution.
Billy and Ken, the school's cross-country stars, were each running at cross-country practice. Billy was going to run 3/4 of the training course, and Ken was going to run 1/2 of the course. However, during practice it started raining, so they could not finish their run. Billy had finished 1/3 of his run, while Ken had finished 1/2 of his run. Which cross-country star ran the furthest?
Final answer:
Billy and Ken both ran 1/4 of the training course before it started raining, making the distance they ran identical; neither ran further than the other.
Explanation:
Comparison of Distances Run by Billy and Ken
To determine which cross-country star, Billy or Ken, ran the furthest, we need to calculate the fractions of the total distance each one ran. Firstly, we'll look at Billy. Billy intended to run 3/4 of the course and finished 1/3 of his planned run. Therefore, the actual distance Billy ran is (3/4) × (1/3).
Now, for Ken. Ken planned to run 1/2 of the course and completed 1/2 of his intended distance. Hence, Ken's actual distance is (1/2) × (1/2). Calculating both distances:
Billy's distance: (3/4) × (1/3) = 1/4
Ken's distance: (1/2) × (1/2) = 1/4
Both Billy and Ken ran 1/4 of the total training course, hence they ran the same distance before it started raining. Therefore, neither ran further than the other.
how many 7th grade students are expected to move by the end of the year? if 12 students actually moved, did more or fewer 7th grade students move than expected? justify your answer.
a. The number of 7th grade students expected to move by the end of the year is 8 students.
b. if 12 students actually moved, more 7th grade students move than expected.
how many 7th grade students are expected to move by the end of the year?
a.
Number of Students: 6th 250, 7th 200, 8th 150 Moves: 6th 2%, 7th 4%, 8th 8%
Number of 7th grade students expected to move by the end of the year = Moves × number of students
= 4% × 200
= 8 students
b.
if 12 students actually moved,
This means number of of 7th grade students expected to move by the end of the year are more.
Complete question:
How many 7th grade students are expected to move by the end of the year? If 12 students actually moved, did more or fewer 7th grade students move than expected? Justify your answer.
Number of Students: 6th 250, 7th 200, 8th 150 Moves: 6th 2%, 7th 4%, 8th 8%
A homeowner wants to increase the size of a rectangular deck that now measures 14 feet by 22 feet. The building code allows for a deck to have a maximum area of 800 square feet. If the length and width are increased by the same number of feet, find the maximum number of whole feet each dimension can be increased.
Answer:
10.6 feet
Step-by-step explanation:
Length = 22ft
width= 14ft
Maximum area = 800 sq. ft
Let X be increase in the number of feet for the length and width.
The new length = (22 + x) ft
New width= (14 + x) ft
Area = (22+x)(14+x) ≤ 800
308 + 36x + x^2 ≤ 800
x^2 + 36x + 308 - 800 ≤ 0
x^2 + 36x - 492 ≤ 0
Solve using quadratic equation
x = (-b +/- √b^2 - 4ac) / 2a
a= 1, b = 36, c= 492
x = (-36 +/- √36^2 - 4*1*-492)/ 2*1
= (-36 +/- √1396 + 1968) / 2
= (-36 +/- √3264) / 2
= (-36 +/- 57.13) / 2
x = (-36 + 57.13)/2 or (-36 - 57.13)/2
x = 21.13/2 or -93.13/2
x = 10.6 or -31.0
x = 10.6 ft
The length and width must increase by 10.6 ft each
The number of whole feet by which the length and width of the deck can be increased would be calculated by setting up and solving an equation taking into account the original dimensions and maximum allowed area for the deck.
Explanation:The question is asking to find by how many whole feet the length and width of the rectangular deck can be increased, given a maximum area limit set by the building code. Let's suppose x is the number of feet by which both the length and width are to be increased. Given that the original area of the deck is 14 feet by 22 feet (which gives an area of 308 square feet), the new dimensions would be (14 + x) feet by (22 + x) feet.
According to the building code, the maximum area allowed for the deck is 800 square feet. We can write and solve the following equation to find x: (14 + x) * (22 + x) = 800.
Solving this equation would yield the maximum integral number of feet each dimension can be increased while still not exceeding the allowed 800 square feet.
Learn more about area calculation here:https://brainly.com/question/34380164
#SPJ11
Kevin and his sister, katy,are trying to solve the system of equations . Keven thinks the new equation should be 3(6x-1)+2y=43 , while katy thinks it should be 3x+2(6x-1)=43.Who is correct and why
Answer:Kathy is correct
Step-by-step explanation: We need to solve both equations separately in order to determine with certainty which one is correct and which one is not.
Kevin thinks the new equation should be
3(6x-1) + 2y = 43
This can now be solved as follows;
18x - 3 + 2y = 43
Add 3 to both sides of the equation
18x - 3 + 3 + 2y = 43 + 3
18x + 2y = 46
2(9x + y) = 46 (factorize the left hand side of the equation by 2)
Divide both sides of the equation by 2
9x + y = 46
The variables remain unsolved
On the other hand, Kathy thinks the new equation should be
3x + 2(6x - 1) = 43
This can now be solved as follows;
3x + 12x - 2 = 43
Collect like terms (in this equation, x)
15x - 2 = 43
Add 2 to both sides of the equation
15x - 2 + 2 = 43 + 2
15x = 45
Divide both sides of the equation by 15
x = 3
In essence, Kathy's equation has a solution (x=3) while that of Kevin remains unsolved
Final answer:
Neither Kevin nor Katy's equations are correct in the context of solving a system of linear equations, as they do not logically combine the given equations correctly.
Explanation:
The question revolves around which sibling is correct in forming a new equation to solve a system of linear equations. To determine this, we need to see which sibling correctly used the properties of equality to combine or manipulate equations. Kevin's equation, 3(6x-1)+2y=43, is an attempt to modify an existing equation by distributing a 3. Katy's equation, 3x+2(6x-1)=43, seems to combine different parts of the given equations.
Upon closer inspection, neither Kevin nor Katy is entirely correct because their proposed equations do not logically follow from the given set. To solve for a system of equations, we would typically add, subtract, multiply, or divide entire equations by constants or variables to eliminate one variable, so we can solve for the other.
The ratio of the lengths of a triangle are 4:6:9 and its perimeter is 57cm. Find the length of the shortest side.
Answer:12cm
Step-by-step explanation:
The ratio are:
4:6:9
Perimeter=57cm
Let a be the unknown value.
The triangle has three sides: 4a, 6a, 9a
Perimeter=The sum of three sides
57=4a + 6a +9a
57=19a
Divide both side by 19
a=57/19
a=3
Therefore
4a:6a:9a
4×3:6×3:9×3
12:18:27
So the shortest side is 12cm
Final answer:
The shortest side of the triangle is found by setting up the sides as a proportion with a common multiplier and using the given perimeter to solve for it. Upon finding the multiplier, we multiply it by the smallest ratio to find the shortest side, which is 12 cm.
Explanation:
To solve for the length of the shortest side of the triangle, we should initially set up the ratio of the sides as 4x:6x:9x, where x is the common multiplier for each side of the triangle. Since the perimeter of the triangle is given as 57 cm, we can write the equation 4x + 6x + 9x = 57 to represent the sum of the sides of the triangle. This simplifies to 19x = 57, and by dividing both sides of the equation by 19, we find that x = 3. Therefore, the shortest side of the triangle, represented by 4x, will be 4 × 3 = 12 cm.
The Poe family bought a house for $240,000. If the value of the house increases at a rate of 4% per year, about how much will the house be worth in 20 years?
Answer:
about $525,900
Step-by-step explanation:
Each year, the value is multiplied by (1 +4%) = 1.04. After 20 years, it will have been multiplied by that value 20 times. That multiplier is 1.04^20 ≈ 2.19112314.
The value of the house in 20 years will be about ...
$240,000×2.19112314 ≈ $525,900 . . . . . rounded to hundreds
Answer: it would be worth $52587 in 20 years.
Step-by-step explanation:
If the value of the house increases at a rate of 4% per year, then the rate is exponential. We would apply the formula for exponential growth which is expressed as
A = P(1 + r/n)^ nt
Where
A represents the value of the house after t years.
n represents the period of increase.
t represents the number of years.
P represents the initial value of the house.
r represents rate of increase.
From the information given,
P = $24000
r = 4% = 4/100 = 0.04
n = 1 year
t = 20 years
Therefore
A = 24000(1 + 0.04/1)^1 × 20
A = 24000(1.04)^20
A = $52587
Jackson has 1 3/8 kg of fertilizar. He used some to fertilizar a flower bed, and he only had 2/3 kg left. How much fertilizar was used in the flower bed
Answer:
17/24
Step-by-step explanation:
11/8 becomes 33/24
2/3 becomes 16/24
(33-16)/24 = 17/24
If a concrete column is 6 inches by 6 inches square and 8 ft. long, calculate its weight in Newtons, given a specific weight of 62.4 lb/ft3.
Step-by-step explanation:
Size of column = 6 inch x 6 inch x 8 ft
Size of column = 0.5 ft x 0.5 ft x 8 ft
Volume of column = 0.5 x 0.5 x 8 = 2 ft³
Specific weight of concrete = 62.4 lb/ft³
Mass = Volume x Specific weight
Mass = 2 x 62.4
Mass = 124.8 lb = 124.8 x 0.454 = 56.66 kg
Weight = 56.66 x 9.81 = 555.83 N
Weight of column is 555.83 N
When a plane flies into the wind, it can travel 3000 ml in 6 h . When it flies with the wind, it can travel the same distance in 5 h. Find the rate of the plane in still air and the rate of the wind
Answer:
plane: 550 mphwind: 50 mphStep-by-step explanation:
If p and w represent the speeds of the plane and wind, respectively, the speed into the wind is ...
p - w = (3000 mi)/(6 h) = 500 mi/h
And, the speed with the wind is ...
p + w = (3000 mi)/(5 h) = 600 mi/h
Adding these two equations gives us ...
2p = 1100 mi/h
p = 550 mi/h . . . . . . . divide by 2
Then the wind speed is ...
w = 600 mi/h - p = (600 -550) mi/h
w = 50 mi/h
The rate of the plane in still air is 550 mi/h; the rate of the wind is 50 mi/h.
Answer:
Step-by-step explanation:
let speed of plane in still air =x
speed of wind=y
(x-y)6=3000
x-y=3000/6=500 ...(1)
(x+y)5=3000
x+y=3000/5=600 ...(2)
adding (1) and (2)
2x=1100
x=1100/2=550
550 +y=600
y=600-550=50
speed of plane in still air=550 m/hr
speed of wind=50 m/hr
Water flows out of a hose at a constant rate after 2 1/3 minutes 9 4/5 gallons of water had come out of the hose at what rate in gallons per minute is the water flowing out of the hose
Answer:
4 1/5 gallons per minute
Step-by-step explanation:
Divide gallons by minutes.
(9 4/5 gal)/(2 1/3 min) = (49/5 gal)/(7/3 min) = (49/5)(3/7) gal/min
= 21/5 gal/min = 4 1/5 gal/min
An open box is to be constructed from a square piece of sheet metal by removing a square of side 2 feet from each corner and turning up the edges. If the box is to hold 32 cubic feet, what should be the dimensions of the sheet metal?
Answer:
length 8 feet and width 8 feet
Step-by-step explanation:
Lets x be the length and width of the sheet
An open box is to be constructed from a square piece of sheet metal by removing a square of side 2 feet from each corner
so height is 2 feet
length of the box is x-4 feet
width of the box is also x-4 feet
Volume of the box is length times width times height
[tex]V= (x-4)(x-4)2[/tex]
[tex]32=2 (x-4)^2[/tex]
divide both sides by 2
[tex]16=(x-4)^2[/tex]
take square root on both sides
[tex]4=x-4[/tex]
Add 4 on both sides
[tex]x=8[/tex]
So dimension of the sheet is
length 8 feet and width 8 feet
Point N lies on the side AB in △ABC. Points K and M are midpoints of segments
BC
and
AN
respectively. Segments
CN
and
MK
intersect at point T. It is known that ∠CTK≅∠TMN and AB=7. Find the length of segment
CN
.
Answer:
CN = 7
Step-by-step explanation:
In the attached figure, we have drawn line CD parallel to AB with D a point on line MK. We know ΔMNT ~ ΔDCT by AA similarity, and because of the given angle congruence, both are isosceles with CD = CT. Likewise, we know ΔCDK is congruent to ΔBMK by AAS congruence, since BK = CK (given).
Then CD = BM (CPCTC). Drawing line NE creates isosceles ΔNEC ~ ΔTDC and makes CE = AB. Because ΔNEC is isosceles, CN = CE = AB = 7.
The length of segment CN is 7.
_____
If you assume CN is constant, regardless of the location of point N (which it is), then you can locate point N at B. That also collocates points T and K and makes ΔBMK both isosceles and similar to ΔBAC. Then CN=AB=7.
Hailey has five times as many stuffed animals as she does dolls her brother has 18 more video games and Hailey has stuffed animals if Hailey has $15 how many video games does her brother have
Answer:
Her brother has 33 video games
Step-by-step explanation:
You take 15 plus 18 because hailey has 15 stuffed animals and her brother has 18 more video games then she has animals so you add 15+ 18 to get your final answer of 33 video games
The number of video games Hailey brother is having will be equal to 93.
What is an equation?Mathematical expressions with two algebraic symbols on either side of the equal (=) sign are called equations.
This relationship is illustrated by the left and right expressions being equal to one another. The left-hand side equals the right-hand side is a basic, straightforward equation.
As per the information given in the question,
Stuffed animals = 5 × dolls (i)
Video games = 18 + stuffed animals (ii)
Total number of dolls Hailey has is 15
Then, put this in equation (i)
Stuffed animals = 5 × 15
= 75
Now, put 75 in equation (ii)
Video games = 18 + 75
= 93
To know more about equation:
https://brainly.com/question/29657983
#SPJ5
Ivan has 15 yd of green felt and 12 yd of blue felt to make 3 quilt if I have I even uses the same total numbers of each of yd for each quilt how many yd does she need To use for each quote
Answer:
9 yards of each quilt.
Step-by-step explanation:
Let the length of each quilt be 'x'.
Given:
Length of green felt = 15 yards
Length of blue felt = 12 yards
Total number of quilts = 3
Total length of all the quilts in terms of 'x' is given as:
[tex]Total\ length=x+x+x=3x ----(1)[/tex]
Total length is also equal to the sum of the lengths of green and blue felts. So,
[tex]Total\ length=15+12=27--- (2)[/tex]
Now, equating equations (1) and (2), we get:
[tex]3x=27\\\\x=\frac{27}{3}\\\\x=9 [/tex]
Therefore, the length of each quilt is 9 yards.
Carolina is twice as old as Raul. Ginny is the oldest and is three times Raul's age plus four. Their ages add up to be 52. How old will Ginny be on her next birthday?
Answer:
29
Step-by-step explanation:
Let c, r, g stand for the current ages of Carolina, Raul, and Ginny. Then we have the relations ...
c = 2r
g = 3r +4
c + r + g = 52
Substituting for c and g, we get ...
2r + r + (3r +4) = 52
6r = 48 . . . . . . . . . . . . . subtract 4
r = 8 . . . . . . . . . . . . . . . divide by 8
g = 3(8) +4 = 28 . . . . . .Ginny is presently 28
On Ginny's next birthday, she will be 29.
Answer: Ginny would be 29 years old on her next birthday.
Step-by-step explanation:
Let c represent Carolina's current age.
Let r represent Raul's current age.
Let g represent Ginny's current age.
Carolina is twice as old as Raul. It means that
c = 2r
Ginny is the oldest and is three times Raul's age plus four. It means that
g = 3r + 4
Their ages add up to be 52. It means that
c + r + g = 52 - - - - - - - - - - - - 1
Substituting
c = 2r and g = 3r + 4 into equation 1, it becomes
2r + r + 3r + 4 = 52
6r + 4 = 52
6r = 52 - 4 = 48
r = 48/6 = 8
c = 2r = 2 × 8
c = 16
g = 3r + 4 = 3 × 8 + 4
g = 24 + 4 = 28
On Ginny's next birthday, she would be 28 + 1 = 29 years old
Beth has 250 comic books in her collection She begins to sell 20 of them each week. Martin has 80 comic books in his collection. He
begins buying 15 new comic books each week
Select from the choices below, dragging and dropping to build an inequality that could be used to determine when Martin's comic book
collection exceeds Beth's
Answer:
The answer to your question is 250 - 20 < 80 + 15x
Step-by-step explanation:
Data
Beth has 250 books and sells 20 each week
Martin has 80 books and sells 15 each week
week = x
Process
1.- Write an equation for each situation
Beth 250 - 20x
Martin 80 + 15 x
2.- Write the inequality
250 - 20 < 80 + 15x