Answer:
y=21.5x+10.5
Step-by-step explanation:
Find (r-s) (t-s) + (s-r) (s-t) for all numbers r, s, and t. (a) 0 (b) 2 (c) 2rt (d) 2(s-r) (t-s) (e) 2(r-s) (t-s)
Answer:
d
Step-by-step explanation:
If a convex polyhedron has 18 edges and 12 vertices, then how many faces does it have?
Determine the width of the garden. Nina must put 60 feet of fencing around her rectangular garden. The length of the garden is three feet longer than twice the width. What is the solution set for 2w + 2(2w + 3) = 60 given the replacement set {6, 7, 8, 9}?
2w+2(2w+3)=60
2w+4w+6=60
6w+6=60
6w=54
w=54/6 =9
the width is 9 feet
Answer:
9 is a solution.
Step-by-step explanation:
The replacement set is the set of values that can be substituted in the equation (for the variables).
Given a replacement set, we need to substitute every value of the set in our equation and see if the equation holds for that value. If it does, then the value is a solution of the equation.
In this problem we have the equation 2w + 2(2w + 3) = 60 and the replacement set is {6,7,8,9}
We are going to start replacing the different values of the set.
w = 6[tex]2w + 2(2w + 3) = 60\\2(6) + 2(2(6)+3) = 60\\12 + 2(12+3) = 60\\12 + 2(15) = 60\\12 + 30 \neq 60[/tex]
Thus, 6 is not a solution.
w = 7[tex]2w + 2(2w + 3) = 60\\2(7) + 2(2(7) +3) = 60\\14 + 2 (14+3) =60\\14 + 2(17)=60\\14+34=60\\48 \neq 60[/tex]
Thus, 7 is not a solution.
w = 8[tex]2w + 2(2w + 3) = 60\\2(8) + 2(2(8)+3) = 60\\16 + 2(16+3)=60\\16 +2 (19) =60\\16 + 38 \neq 54[/tex]
Thus, 8 is not solution.
w = 9[tex]2w + 2(2w + 3) = 60\\2(9) + 2(2(9) + 3) =60\\18 + 2 (18+3) =60\\18 +2(21)=60\\60=60[/tex]
Thus, 9 is a solution.
Find the perimeter and area of a square with side lengths of 16
perimeter = 4S = 16*4 = 64 units
area = S^2 = 16^2 = 256 square units
Answer:
The perimeter of a square with side lengths of 16 units is 64 units.
The area of a square with side lengths of 16 units is [tex]256 unit^2[/tex].
Step-by-step explanation:
Length of the square = a = 16 units
Perimeter of the square = P = [tex\]4\times a[/tex]
[tex]P=4\times 16 units = 64 units[/tex]
Area of the square = A = [tex]a^2[/tex]
[tex]A=a^2=(16 unit)^2=256 unit^2[/tex]
The perimeter of a square with side lengths of 16 units is 64 units.
The area of a square with side lengths of 16 units is [tex]256 unit^2[/tex].
Choose the equation that represents the line passing through the point (-2,-3) with a slope of -6
Awnsers are
A) y=-6x-15
B) y=-6x-20
C) y=-6x+15
D) y=-6x+20
Answer:A
Step-by-step explanation:
A six-sided die is rolled three times. what is the probability that all three rolls will be 6?
you have a 1/6 probability of rolling a 6
so for 3 6's it would be
1/6 x 1/6 x 1/6 = 1/216
The probability of a randomly selected car crashing during a year in a certain country is 0.04770.0477. if a family has threethree cars, find the probability that at least one of them has a car crash during a year. is there any reason why the probability might be wrong?
Billy Goats invested some money in stocks and bonds. The total amount he invested was $\$165,\!000$. If he invested 4.5 times as much in stocks as he did in bonds, what was his total investment in stocks?
An equation is formed when two equal expressions. The total investment that Billy made in stocks is $135,000.
What is an equation?An equation is formed when two equal expressions are equated together with the help of an equal sign '='.
Let the amount that is invested in stocks be represented by x, while the amount that is been invested in bonds is represented by y.
Given that Bily invested 4.5 times as much in stocks as he did in bonds. Therefore, the equation to represent the given situation can be written as,
x = 4.5y
Also, given that the total amount that Billy invested is $165,000. Therefore, the total invested amount can be written as,
$165,000 = x + y
Substitute the value of x in the equation,
$165,000 = 4.5y + y
$165,000 = 5.5y
y = $165,000 / 5.5
y = $30,000
Now substitute the value of y in the first equation to know Billy's investment in stocks.
x = 4.5y
x = 4.5($30,000)
x = $135,000
Hence, the total investment that Billy made in stocks is $135,000.
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can someone explain how to do this plzz
*PLEASE HELP!!* The minimum sustained wind speed of a Category 1 hurricane is 74 miles per hour. The maximum sustained wind speed is 95 miles per hour. Write an absolute value equation that represents the minimum and maximum speeds. Let v
represent the wind speed.
Answer:
Using [tex]|X-a|=b[/tex]
where a is the center or average and b is the distance from the center or the range
Here, v represents the wind speed.
As per the statement:
Minimum sustained wind speed(A)= 74 miles per hour.
Maximum sustained wind speed(B) = 95 miles per hour.
Use the center and distance to write an absolute value equation:
[tex]\text{Center} = \frac{\text{A+B}}{2}[/tex]
then;
[tex]\text{Center (a)} = \frac{74+95}{2}=\frac{169}{2}=84.5[/tex]
Distance from the center(b)= 95-84.5 = 10.5
then;
[tex]|v-84.5| =10.5[/tex]
Therefore, an absolute value equation that represents the minimum and maximum speeds is, [tex]|v-84.5| =10.5[/tex]
think of a number. add two. multiply by three. add your original number. multiply by 2. add 2. subtract your original number. divide by 7. add three. subtract your original number. add five. Why is the answer always ten?
The length of a rectangle is three inches more than the width. the area of the rectangle is 460 inches. if the width is x, what is the length in terms of x?
The length and width of the given rectangle are 23 and 20 inches respectively.
Suppose the width of the given rectangle=x inch
So, the length of the given rectangle = x+3 inch
What is the area of a rectangle?The area of a rectangle with length l and width b is lb.
So, the area of the given rectangle = x(x+3)
Given that area of the rectangle = 460 squared inches
So, x(x+3)=460
[tex]x^{2} +3x=460[/tex]
[tex]x^{2} +x-460=0[/tex]
[tex]x^{2} +23x-20x-460=0[/tex]
[tex]x(x+23)-20(x+23) =0[/tex]
[tex](x+23) (x-20)=0[/tex]
[tex]x=-23[/tex]...Not possible
[tex]x=20[/tex]
The width of the rectangle =20 inches
So, the length of the rectangle =20+3 = 23 inches
Therefore, the length and width of the given rectangle are 23 and 20 inches respectively.
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The mean diastolic blood pressure for a random sample of 70 people was 94 millimeters of mercury. if the standard deviation of individual blood pressure readings is known to be 12 millimeters of mercury, find a 90% confidence interval for the true mean diastolic blood pressure of all people.
To solve this problem, we make use of the formula for Confidence Interval:
Confidence Interval = X ± z * σ / sqrt (n)
where X is the mean value, z is the z score which is taken from the standard tables, σ is the standard deviation, and n is the number of samples
z = 1.645 (at 90% Confidence Level)
Substituting the values into the equation:
Confidence Interval = 94 ± 1.645 * 12 / sqrt (70)
Confidence Interval = 94 ± 2.36
Confidence Interval = 91.64, 96.36
Therefore at 90% confidence level, the blood pressure reading ranges from 91.64 mmHg to 96.36 mmHg.
A family has ninenine children. if this family has exactly threethree boysboysâ, how many different birth and gender orders areâ possible
what is the 8th term of this geometric sequence? 5,-10,20,-40
The 8th term of this geometric sequence 5,-10,20,-40 = -640.
What is a geometric sequence?A geometric sequence is one in which every number is the product of its previous number and a constant ratio.
The first term is taken as a, the constant ratio is taken as r. The n-th term of such a series is given as aₙ = a.rⁿ⁻¹.
How to solve the given question?In the question, we are asked to find the 8th term of the geometric sequence 5, -10, 20, -40.
The first term (a) = 5.
The constant ratio (r) = -10/5 = -2.
We will find the 8th term using the formula of the n-th term aₙ = a.rⁿ⁻¹.
Therefore, 8th term = 5(-2)⁸⁻¹ = 5 * (-2)⁷ = 5 * (-128) = -640.
The 8th term of this geometric sequence 5,-10,20,-40 = -640.
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Find the area of the shaded region.
Round to the nearest hundredth.
A triangle has squares on its three sides as shown below. What is the value of x? Three squares having side lengths 6 cm, x cm, and 8 cm joining to form right triangle at the centre 2 centimeters 6 centimeters 8 centimeters 10 centimeters
The third side of the triangle is AC = 10 centimeters
What is a Triangle?A triangle is a plane figure or polygon with three sides and three angles.
A Triangle has three vertices and the sum of the interior angles add up to 180°
Let the Triangle be ΔABC , such that
∠A + ∠B + ∠C = 180°
The area of the triangle = ( 1/2 ) x Length x Base
For a right angle triangle
From the Pythagoras Theorem , The hypotenuse² = base² + height²
if a² + b² = c² , it is a right triangle
if a² + b² < c² , it is an obtuse triangle
if a² + b² > c² , it is an acute triangle
Given data ,
Let the triangle be represented as ΔABC
Now , the measures of the sides of the triangle are
The measure of side AB = 6 cm
The measure of side BC = 8 cm
Now , For a right angle triangle
From the Pythagoras Theorem , The hypotenuse² = base² + height²
On simplifying , we get
The measure of side AC = √ ( AB )² + ( BC )²
The measure of side AC = √ ( 6 )² + ( 8 )²
The measure of side AC = √ ( 36 + 64 )
The measure of side AC = √ ( 100 )
The measure of side AC = 10 cm
Therefore , the value of AC is 10 cm
Hence , the right triangle is solved and the side AC = 10 cm
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Negative numbers are less than positive numbers. Does this mean that the absolute value of a negative number must be less than the absolute value of a positive number? Explain.
Simplify the following expression: (Multiple Choice)
a + 2c − 5b − c + a − b
1. 2a − 6b + 2c
2. 2a − 6b + c
3. a − 6b + c
4. a − 5b + 2c
Answer:
a + a - 5b - b + 2c - c
2a - 6b + c
the answer is 2
A fire hydrant that is 1.5 feet high casts a shadow that is 2.5 feet long. At the same time of day, a lamppost casts a shadow 15 feet long. What is the height of the lamppost?
Answer:
9 feet
Step-by-step explanation:
Solve (2/3)-(1/x)=5/6
PLEASE HELP!!!! IMAGE ATTACHED find the value of x
A runner sprints around a circular track of radius 110 m at a constant speed of 7 m/s. the runner's friend is standing at a distance 220 m from the center of the track. how fast is the distance between the friends changing when the distance between them is 220 m? (round your answer to two decimal places.)m/s
The distance between the friends changing with the rate of 7√15/4 meter per sec.
Let B represents the position of runner, A represents the position of the friend and C represents the position of centre of the circular track. ( shown below ),
We need to find: dc/dt
By the cosine law,
[tex]c^2 =a^2+b^2+2abcosC[/tex]
Differentiating with respect to t ( time ),
[tex]2c \frac{dc}{dt}=2absinC \frac{dc}{dt}[/tex]
[tex]\frac{dc}{dt}=\frac{2absinC\frac{dc}{dt}}{2c}[/tex]..(1)
Now, by arc length formula,
Radius( say r ) × angle = arc length ( say l )
r × ∠C= l
Differentiating w. r. t. t,
[tex]r \times \frac{dC}{dt} + \angle C \times \frac{dr}{dt} = \frac{dl}{dt}[/tex]
Here dl/dt=7 m per sec
dr/dt=0
r=110
dC/dt=7/110
Now again , [tex]C^2= a^2+b^2-2abcosC[/tex]
[tex]220^2 = 110^2 + 220^2 -2(110)(220)cosC[/tex]
[tex]48400=12100+48400-48400cosC[/tex]
[tex]-12100=-48400cosC[/tex]
[tex]1/4=cosC[/tex]..(2)
[tex]sinC=\frac{\sqrt{15}}{4}[/tex] ...(3)
From equation (1), (2) and (3),
[tex]dC/dt = \frac{(110)(220)\sqrt{15}/4. 7/110}{220}[/tex]
=7√15/4 meter per second.
Hence, the distance between the friends changing with the rate of 7√15/4 meter per sec.
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When the runner's distance from his friend is same as the distance from the friend to center of the track, the runner is moving in a way that the distance between him and his friend isn't changing. Hence, at those specific moments, their relative speed is zero m/s.
Explanation:This problem involves the concept of relative velocities in a plane. Since the runner is moving along a circular path with a constant speed of 7 m/s, the runner's speed towards or away from his friend depends on the runner's location on the track. However, when the runner is at a distance of 220 m from his friend (which is also the distance from the friend to the center of the track), the runner is moving perpendicular to the line joining the runner and his friend. This is because, in this particular case, the runner is moving along a tangent to the circle that intersects the friend's location. Therefore, the distance between the friends isn't changing at all during those moments - their relative speed is zero m/s.
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Use the graph below to answer the question that follows:
What is the average rate of change between the interval of x = 0 and x = pi/2?
A) 2/pi
B) pi/2
C) pi/4
D) 4/pi
Answer:
the correct answer is option D.
Step-by-step explanation:
average rate of change in the graph in interval x = 0 and x = pi/2
when we look into the graph between interval x = 0 and x = pi/2
we can see that on y - axis
at x = 0 value of y = 3 and
at x = π/2 value of y = 5
rate of change = [tex]\frac{change\ in y-axis}{change\ in\ x-axis}[/tex]
= [tex]\dfrac{y_2-y_1}{x_2- x_1}[/tex]
=[tex]\dfrac{5-3}{\frac{\pi}{4} - 0}[/tex]
= 4/π
hence, the correct answer comes out to be 4/π
hence, the correct answer is option D.
Name three common measurements that are expressed as a ratio of two units.
Density , Speed and Mileage(Fuel Economy) are the three common measurements which can be expressed as a ratio of two units.
What are Fundamental Units?
A fundamental unit is a tool for measuring a base quantity. Any physical quantity that cannot be expressed in terms of another physical quantity is referred to as a basic quantity. They are
Length - meter (m)Time - second (s)Amount of substance - mole (mole)Electric current - ampere (A)Temperature - kelvin (K)Luminous intensity - candela (cd)Mass - kilogram (kg)Three Common Measurements be Density , Speed and Mileage where
Density = [tex]\frac{kg}{m^{3} }[/tex]
Speed = [tex]\frac{m}{s}[/tex]
Mileage = [tex]\frac{km}{L}[/tex]
Hence , the three common measurements which can be expressed as a ratio of two units are Density , Speed and Mileage
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Need help. First to answer correctly gets brainliest
In the formula that gives the circumference of a circle, which quantity is multiplied by 2 ?
Answer (APEX):
- Radius
When a positive integer k is divided by 6, the remainder is 1. what is the remainder when 5k is divided by 3?
Final answer:
The remainder when 5k is divided by 3 is 2. This is because k can be represented as 6n + 1 where n is the quotient, and when 5 is multiplied by k and then divided by 3, after simplifying, only the term +5 contributes to the remainder.
Explanation:
When a positive integer k is divided by 6, the remainder is 1. Thus, we can write k as 6n + 1 where n is a quotient. To find the remainder when 5k is divided by 3, we must first multiply k by 5, resulting in 5(6n + 1) = 30n + 5.
Breaking down 30n + 5, we see that 30n is divisible by 3 since 30 is a multiple of 3. Hence, it will not contribute to the remainder when divided by 3. All that is left to consider is the +5 part. The closest multiple of 3 to 5 is 3 itself, meaning 5 divided by 3 will leave a remainder of 2. Therefore, the remainder when 5k is divided by 3 is 2.
GRADE 12 DATA MANAGEMENT!!! HELP PLEASE
The Leafs’ coach stated that “the likelihood of us winning the next game are 2/9, the likelihood of tying the next game are 1/2, and likelihood of us loosing the next game are 2/5”. Can the coach’s predictions be entirely correct? Justify your response
The coach's predictions cannot be entirely correct because the sum of the probabilities given by the coach does not equal 1. Therefore, the coach's predictions are not consistent with the rules of probability.
Explanation:The coach's predictions cannot be entirely correct because the sum of the probabilities of all possible outcomes must equal 1. In this case, the sum of the probabilities given by the coach is 2/9 + 1/2 + 2/5 = 49/90, which is not equal to 1. Therefore, the coach's predictions are not consistent with the rules of probability.
To justify this, we can add up the probabilities of winning, tying, and losing the next game. The correct probabilities should add up to 1 since these are the only possible outcomes.
If we add these probabilities together: 2/9 + 1/2 + 2/5 = 49/90, which is not equal to 1. Therefore, the coach's predictions cannot be entirely correct.
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A construction worker needs to put a rectangular window in the side of a building. He knows from measuring that the top and bottom of the window have a width of 9 feet and the sides have a length of 12 feet. He also measured one diagonal to be 15 feet. What is the length of the other diagonal?
Answer: 15 feet
Step-by-step explanation:
The length of other diagonal is 15 feet.
What are properties of diagonal of rectangle?Both diagonals bisect opposite angles of the quadrilateral. Both diagonals form symmetry lines for the quadrilateral. The diagonals divide the quadrilateral into four congruent right triangles. The intersection point of the diagonals is the incenter of the quadrilateral
Given:
width= 9 feet
length= 12 feet
Diagonal length = 15 feet
We know the diagonals of a rectangle are equal and bisect each other.
So,
The length of other diagonal is 15 feet.
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