Answer:
3 v (v - 7) (w - 1) thus the answer is B:
Step-by-step explanation:
Factor the following:
3 v^2 w - 21 v w - 3 v^2 + 21 v
Factor 3 v out of 3 v^2 w - 21 v w - 3 v^2 + 21 v:
3 v (v w - 7 w - v + 7)
Factor terms by grouping. v w - 7 w - v + 7 = (v w - 7 w) + (7 - v) = w (v - 7) - (v - 7):
3 v w (v - 7) - (v - 7)
Factor v - 7 from w (v - 7) - (v - 7):
Answer: 3 v (v - 7) (w - 1)
Thirty-five points on the line!!!
A bag contains five plain muffins and six blueberry muffins. Without looking, Sherman selects a muffin, hands it to his sister and then selects a second muffin for himself. What is the probability that Sherman gets a plain muffin, and his sister gets a blueberry muffin?
A. 30/121
B. 3/11
C. 5/11
D. 5/6
Your answer would be B) 3/11, hope this helps!
Remember there are 11 muffins in the bag
Answer:
The answer is B. 3/11
I’ve been confused on this question! Does anyone know?
Answer:
I think it is A. But i'm not 100% sure.
Step-by-step explanation:
Hope my answer has helped you!
a rectangle is 6 units "wide" and x -8 use long it has the same area of a triangle with a height of 7 units and a base of x minus 3 years what is the area of the rectangle
Answer:
42 square units
Step-by-step explanation:
The area of the rectangle is the product of its length and width:
area = 6(x -8)
The area of the triangle is half the product of its base and height:
area = (1/2)(x-3)·7
These two areas are equal, so we have ...
6(x -8) = (1/2)(x -3)(7)
6x -48 = 3.5x -10.5 . . . . eliminate parentheses
2.5x = 37.5 . . . . . . . . . . . add 48 -3.5x
x = 15 . . . . . . . . . . . . . . . divide by 2.5
The area of the rectangle is ...
area = 6(15 -8) = 42 . . . . square units.
Use the graph below to determine the number of solutions the system has. x = - 4 y = - x - 1
Answer:
Final answer is given by x=-4, y=3
Step-by-step explanation:
Question says to use the given graph to determine the number of solutions the system where given system is x = - 4, y = - x - 1
Graph is missing but we can still find the solution.
plug first equation x=-4 into other equation y=-x-1
y=-x-1
y=-(-4)-1
y=4-1
y=3
Hence final answer is given by x=-4, y=3
or we can also write that as (-4,3)
Convert 6 hours 36 minutes to decimal hours.
A)6.52 hours
B)6.55 hours
C)6.58 hours
D)6.6 hours
E)6.62 hours
Answer:
D. 6.6 hours
Step-by-step explanation:
100/60= 1.66
Multiply 1.66 times 36 and get 6.6 hours
Hope this helps!
The hour equivalent in decimal to 6 hours 36 minutes is,
D) 6.6 hours
What is a fraction?A fraction is written in the form of p/q, where q ≠ 0.
Fractions are of two types they are proper fractions in which the numerator is smaller than the denominator and improper fractions where the numerator is greater than the denominator.
What is the measure of each integer step in a clock?A clock can be thought of as a circle having 12 steps and we know that circle is 360°,
So, the measure of each integer step of a clock is 30°.
We know, One hour is equivalent to 60 minutes.
Given, We have 6 hours and 36 minutes.
Therefore, The hour equivalent to 36 minutes is,
= 36/60.
= 3/5.
= 0.6 hours.
Therefore, 6 hours and 36 minutes is equal to 6.6 hours.
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Two trains 500 miles apart accidentally are on the same track heading toward each other. The passenger train is traveling 80 mph while the freight train is traveling 40 mph. A dispatcher discovers the error and warns them 1 minute before they were to collide. How far apart, in miles, were they when they were warned?
Answer:
2 miles
Step-by-step explanation:
Their combined speed (speed of closure) is 80 mph + 40 mph = 120 mph.
120 mi/h = 120 mi/(60 min) = 2 mi/min
The distance between the trains at the 1-minute mark is ...
(1 min) · (2 mi/min) = 2 mi
They were warned when two miles apart.
The equation A = x(x - 7) describes the area, A, of a rectangular flower garden, where x is the width in feet.
What would be the width in feet of the flower garden if the area is 8 square feet?
A. 9
B. 1
C. 8
D. 7
x(x-7)=8
x^2-7x-8=0
(x-8)(x+1)=0
so x=8 (and -1 but width can’t be negative)
So your answer is C. 8
Soldering is accomplished by quickly heating metal parts. Solder is a metal that is melted to join metallic surfaces together. Common solder formulations based on tin and lead are listed below. The fraction represents percentage of tin first, then lead, totaling 100%.
Tin/Lead Melting Point (°C)
40/60 230 °C
50/50 214 °C
60/40 190 °C
63/37 183 °C
95/5 224 °C
With the same soldering iron, assuming the soldering iron’s highest temperature is 204 degrees Centigrade, would you be able to make the repair if you had solder made of 50/50?
Answer:
No.
Step-by-step explanation:
50/50 solder is shown to melt at 214 °C. If the soldering iron only heats to 204 °C, it cannot melt the solder. The solder will only be melted if it is heated to a temperature at or higher than its melting point.
Factor 60y-90-20x to identify the equivalent expressions.
Answer:
10(6y-9-2x)
Step-by-step explanation:
60y-90-20x
We can factor out 10 from each term
10(6y-9-2x)
Answer:
10(6y-9-2x)
Step-by-step explanation:
i dont know how to say it bit this is 100% true
Find the value of b in the graph of y=3x+b if it is known that the graph goes through the point: N(0,5)
Answer:
I believe b is 5.
Step-by-step explanation:
When you place the points in the values, you get 5=3(0)+b. When you simplify it, you get 5=b. I really hope this is correct, I apologize if it isn't! I hope this helps! :)
I think it’s five too
5 boys gathered leaves. Each boy filled 2/3 of his bag with leaves. How many bags of leaves in all did the 5 boys collect?
Answer:
3 1/3 bags
Step-by-step explanation:
5 × 2/3 = (5×2)/3 = 10/3 = 3 1/3
The total quantity of leaves gathered is equivalent to 3 1/3 full bags.
For ΔABC, ∠A = 4x + 7, ∠B = 2x + 3, and ∠C = 6x - 10. If ΔABC undergoes a dilation by a scale factor of 2 to create ΔA'B'C' with ∠A' = 5x - 8, ∠B' = 3x - 12, and ∠C' = 7x - 25, which confirms that ΔABC∼ΔA'B'C by the AA criterion?
Final answer:
To establish that ΔABC is similar to ΔA'B'C' by the AA criterion, we need to verify that two pairs of angles are congruent. The sum of angles in each triangle should be equal to 180 degrees. However, the dilation scale factor does not affect angles, so both triangles are similar by AA criterion.
Explanation:
The question involves determining whether two triangles are similar by the AA (Angle-Angle) criterion. The original triangle ΔABC has angles ∠A = 4x + 7, ∠B = 2x + 3, and ∠C = 6x - 10. Similarly, the dilated triangle ΔA'B'C' has angles ∠A' = 5x - 8, ∠B' = 3x - 12, and ∠C' = 7x - 25. To confirm the similarity using the AA criterion, we need to prove that at least two angles of ΔABC are congruent to two angles of ΔA'B'C'.
However, upon examination of the provided angles, it's clear that there is an inconsistency. The angles of the original triangle ΔABC must add up to 180 degrees, as must the angles of the dilated triangle ΔA'B'C'. This gives us two equations to solve for x, 4x + 7 + 2x + 3 + 6x - 10 = 180 for ΔABC and 5x - 8 + 3x - 12 + 7x - 25 = 180 for ΔA'B'C'. Solving these would give us the values of x that we could use to find the angles. But the actual correspondence of angles and the fact that the sum of angles in both triangles must be equal indicates that the scale factor of dilation does not change the angles, which means ΔABC should be similar to ΔA'B'C' by AA criterion regardless of the values of x.
write in y = mx + b form (1) -x-5y = 21. (2) -2x - 5y = 25
1. -x-5y=21
-5y=x+21
y= -1/5x-21/5
2.-2x-5y=25
-5y=2x+25
y= -2/5x-5
square root of 29-12square root of 5
For this case we have the following expression:
[tex]\sqrt {29-12 \sqrt {5}}[/tex]
The expression can not be simplified, we can write its decimal form.
We have to:
[tex]12 \sqrt {5} = 26.83281572[/tex]
Then, replacing:
[tex]\sqrt {29-26.83281572} =\\\sqrt {2,16718428} =\\1.4721359584[/tex]
If we round up we have:
[tex]\sqrt {29-12 \sqrt {5}} = 1.47[/tex]
ANswer:
[tex]\sqrt {29-12 \sqrt {5}} = 1.47[/tex]
HELP PLEASE I do not know what to do i can only add photos of the answers i need help fast thank you
Answer:
f(x) = 3 if x ≤ -2
= 1 if x > -2 ⇒ attached figure
Step-by-step explanation:
* Lets explain how to answer the question
- For the part of the graph on the left side (2nd quadrant)
- There is a horizontal line start from x = -∞ and stop at x = -2
- The end of the line is black dot means x = -2 belongs to the function
- The horizontal line drawn at y = 3
∴ The equation of the horizontal line is y = 3
∴ The function represents this part of graph is y = 3 if x ≤ -2
- The other part of the graph is also horizontal line start from
x = -2 to x = ∞
- The end of the line is white dot means x = -2 does not belong
to the function
- The horizontal line drawn at y = 1
∴ The equation of the horizontal line is y = 1
∴ The function represents this part of graph is y = 1 if x > -2
* f(x) = 3 if x ≤ -2
= 1 if x > -2
- The answer is attached
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قرهغىع24عغع2ر
If point (x, y) is reflected over the y-axis, the resulting point is (-x, y)
Answer:
That is correct
Step-by-step explanation:
If its reflecting over the y axis only the x is becoming opposite. the x becomes -x, so (x, y) is reflected over the y-axis, the resulting point is (-x, y)
A reflection over the y-axis in mathematics results in changing the sign of the x-coordinate of a point, while the y-coordinate remains the same. This is a property associated with even functions, which are symmetric around the y-axis. The process is a transformation involving a change in direction.
Explanation:In mathematics, a point's reflection over the y-axis is represented as (-x, y). When you reflect a point across the y-axis, the x-coordinate changes its sign while the y-coordinate stays the same. For example, if we start with point (2,3), its reflection would be at point (-2,3) across the y-axis.
Notably, this reflection is a property of even functions, which are symmetric around the y-axis. To visualize this, you can plot specific values for (x,y) data pairs and observe the symmetry.
The reflection process can be seen as a transformation involving a change in direction represented by unit vectors. In a plane, it’s customary that the positive direction on the x-axis is denoted by the unit vector i and the positive direction on the y-axis by the unit vector j. The reflection over the y-axis turns the x components in the opposite direction, hence -x.
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The point (-7,4) is reflected over the line x=-3. Then the resulting point is reflected over the line y=x. Where is the point located after both reflections
Answer:
(4, 1)
Step-by-step explanation:
Since the first reflection is over the vertical line x=-3, the y-coordinate remains the same. The x-coordinate of A' will make the point (-3, 4) on the line of reflection be the midpoint between A and A':
(-3, 4) = (A +A')/2
2(-3, 4) -A = A' = (-6-(-7), 8 -4) = (1, 4)
The reflection over the line y=x simply interchanges the two coordinate values:
A'' = (4, 1)
The point (-7,4) upon reflection over the lines x = -3 and y = x would be at point; (4,1).
According to the question;
We are required to determine where the point is located after both reflections.For the first reflection;
The first reflection is over the vertical line defined at, x=-3. Consequently, the y-coordinate remains constant.However, the x-coordinate of P' will make the point (-3, 4) on the line of reflection be the midpoint between A and A':
(-3, 4) = (P +P')/2 2(-3, 4) -P = P' = (-6-(-7), 8 -4) = (1, 4)For the second reflection;
The reflection over the line y=x simply interchanges the x- and y- coordinate values:Ultimately, the point P'' = (4, 1)
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An equation is given. (Enter your answers as a comma-separated list. Let k be any integer. Round terms to three decimal places where appropriate. If there is no solution, enter NO SOLUTION.) 3 tan(3θ) − 1 = 0 (b) Find the solutions in the interval [0, 2π).
[tex]3\tan3\theta-1=0[/tex]
[tex]3\tan3\theta=1[/tex]
[tex]\tan3\theta=\dfrac13[/tex]
Recall that the tangent function has a period of [tex]\pi[/tex] so that
[tex]3\theta=\tan^{-1}\dfrac13+k\pi[/tex]
for any integer [tex]k[/tex]. Then
[tex]\theta=\dfrac13\tan^{-1}\dfrac13+\dfrac{k\pi}3[/tex]
We get 6 solutions in the interval [0, 2π) for [tex]0\le k\le5[/tex],
[tex]\theta\approx0.107[/tex]
[tex]\theta\approx1.154[/tex]
[tex]\theta\approx2.202[/tex]
[tex]\theta\approx3.249[/tex]
[tex]\theta\approx4.296[/tex]
[tex]\theta\approx5.343[/tex]
b. 64x3 - 125
Factor sum or difference of cubes
Answer:
(4x -5)(16x^2 +20x +25)
Step-by-step explanation:
The factoring of the difference of cubes is something you might want to memorize, or keep handy:
(a³ -b³) = (a -b)(a² +ab +b²)
Here, the minus sign in the middle tells you this is a difference. The power of x is a clue that this might be the difference of cubes. Your knowledge of cubes of small integers tells you ...
64 = 4³125 = 5³so you can recognize this as ...
(4x)³ - 5³ . . . . . the difference of cubes.
___
Since you are familiar with the factorization above, you can easily write down the factoring of this expression using a=4x, b=5.
(4x -5)(16x² +20x +25)
_____
For "completeness", here is the factorization of the sum of cubes:
a³ +b³ = (a +b)(a² -ab +b²)
Note the linear factor (a +b) has the same sign as the sign between the cubes. The sign of the middle 2nd-degree term (ab) is opposite that.
Find the Maclaurin series for f(x) using the definition of a Maclaurin series. [Assume that f has a power series expansion. Do not show that Rn(x) → 0.] Find the associated radius of convergence R. f(x) = 6(1 − x)−2
I guess the function is
[tex]f(x)=\dfrac6{(1-x)^2}[/tex]
Rather than computing derivatives of [tex]f[/tex], recall that for [tex]|x|<1[/tex], we have
[tex]g(x)=\dfrac1{1-x}=\displaystyle\sum_{n=0}^\infty x^n[/tex]
Notice that
[tex]g'(x)=\dfrac1{(1-x)^2}[/tex]
so that [tex]f(x)=6g'(x)[/tex]. Then
[tex]f(x)=6\displaystyle\sum_{n=0}^\infty nx^{n-1}=6\sum_{n=1}^\infty nx^{n-1}=6\sum_{n=0}^\infty(n+1)x^n[/tex]
also valid only for [tex]|x|<1[/tex], so that the radius of convergence is 1.
What are the constants in this expression?
x-3+2/3-y/2
A. 1 and -3
B. -3 and 2/3
C. -3 and -y/2
D. 2/3 and -1/2
Answer:
B. -3 and 2/3
Step-by-step explanation:
One way to see the constants is to set the variables to zero. What's left is ...
-3 + 2/3
These are the constants in the expression.
Answer:
c
Step-by-step explanation:
What is the area of the base in the figure below
Answer:
[tex]A=9\pi\ square\ units[/tex]
Step-by-step explanation:
we know that
The base of the cylinder is a circle
The area of the circle is equal to
[tex]A=\pi r^{2}[/tex]
we have
[tex]r=6/2=3\ units[/tex] ----> the radius is half the diameter
substitute
[tex]A=\pi (3)^{2}[/tex]
[tex]A=9\pi\ units^{2}[/tex]
BBBBBBBBBBBBBBBBB
the answer is B
points (1,3) and (5,3) lie on line r. what is the slope of the line that is parallel to r?
First we must find out the slope of the points
The equation for slope is
[tex]\frac{y_{2} - y_{1}}{x_{2}-x_{1}}[/tex]
Let's plug in our points
[tex]\frac{3 - 3 }{5 -1 } = \frac{0}{4}[/tex]
Our slope is 0
When lines are parallel, that means we have they have the same slope
So a line that is parallel to r would have a slope of 0!
What’s is the median for this number
8,9,3,1,2,6,5,7,4,0,10
Answer:
To find the median, set the numbers in order and the median is the number in the middle. If there was an even number of number then you would the two middle numbers and average it.
0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10
So the median in this case would be 5
Answer: 6
Step-by-step explanation:
Median means the middle. You cross out a number from each side until you get one number and it’s 6. If there was uneven amount of numbers, and you were left with two numbers you add them and divide of how many numbers there are
What is the lateral area of the cone to the nearest whole number? The figure is not drawn to scale.
NEED HELP ASAP!!!!!!!!!!!!!!!!!!!!!
Answer:
25,133 m^2
Step-by-step explanation:
The lateral area of a cone is found using the slant height (s) and the radius (r) in the formula ...
A = πrs
So, we need to know the radius and the slant height.
The radius is half the diameter, so is (160 m)/2 = 80 m.
The slant height can be found using the Pythagorean theorem:
s^2 = r^2 + (60 m)^2 = (80 m)^2 +(60 m)^2 = (6400 +3600) m^2
s = √(10,000 m^2) = 100 m
Now, we can put these values into the formula to find the lateral area:
A = π(80 m)(100 m) = 8000π m^2 ≈ 25,133 m^2
I am desperate! 95 points for correct answer!!!!!
1543 pages is $77.40, 7361 pages is $368.30 using a linear equation with $250 in budget how many pages can you print. Please write steps!
Answer:
[tex]\boxed{\text{4995 pages}}[/tex]
Step-by-step explanation:
The question is asking you to find the equation of a straight line that passes through two points
Let x = the number of pages
and y = the cost
Then the coordinates of the two points are (1543, 77.40) and (7361, 368.30).
(a) Calculate the slope of the line
[tex]\begin{array}{rcl}m & = & \dfrac{y_{2} - y_{1}}{x_{2} - x_{1}}\\\\ & = & \dfrac{368.30 - 77.40}{7361 - 1543}\\\\& = & \dfrac{290.90}{58.18}\\\\ & = & 0.05000\\\end{array}[/tex]
In other words, the cost is 5¢ per page.
(b) Calculate the y-intercept
[tex]\begin{array}{rcl}y & = & mx + b\\368.30 & = & 0.05 \times 7361 + b\\368.30 & = & 368.05 + b\\b & = & 0.25\\\end{array}[/tex]
(c) Write the equation for the line
y = 0.05x + 0.25
That is, the cost is 25¢ plus 5¢ per page
(d) Calculate the pages you can print for $250
[tex]\begin{array}{rcl}y & = & 0.05x + 0.25\\250 & = & 0.05x + 0.25\\249.75 & = & 0.05x\\x & = & 4995\\\end{array}\\\text{ You can print }\boxed{\textbf{4995 pages}}[/tex]
The figure below shows the graph of your equation, with slope 0.05 and y-intercept at (0,0.25).
It looks as if you could print 5000 pages, but you must pay that 25¢ (5 pages worth) up-front, so you can print only 4995.
Answer:
4995 pages
Step-by-step explanation:
The question is asking you to find the equation of a straight line that passes through two points
Let x = the number of pages
and y = the cost
Then the coordinates of the two points are (1543, 77.40) and (7361, 368.30).
(a) Calculate the slope of the line
In other words, the cost is 5¢ per page.
(b) Calculate the y-intercept
(c) Write the equation for the line
y = 0.05x + 0.25
That is, the cost is 25¢ plus 5¢ per page
(d) Calculate the pages you can print for $250
The figure below shows the graph of your equation, with slope 0.05 and y-intercept at (0,0.25).
It looks as if you could print 5000 pages, but you must pay that 25¢ (5 pages worth) up-front, so you can print only 4995.
A dumpster, in the shape of a right rectangular prism, has a length of 10 feet, a width of 5.5 feet, and a height of 4 feet. It is completely full of yard waste that weighs, on average, 7.5 pounds/cubic foot. What is the weight of the yard waste to the nearest pound? Enter the number only.
Answer:
The weight of the yard waste = 1650 pounds
Step-by-step explanation:
* Lets revise the rule of the volume of the prism
- The rectangular prism has 6 rectangular faces
- Its base shaped a rectangle of dimensions length and width
- The volume of the rectangular prism = Area of its base × its height
∵ Area of the rectangle = length × width
∴ The volume of the prism = length × width × height
* Now lets solve the problem
∵ The length of the rectangular prism = 10 feet
∵ The width of it = 5.5 feet
∵ The height of it = 4 feet
∴ Its volume = 10 × 5.5 × 4 = 220 feet³
- The prism is completely full of yard waste
∴ The volume of the yard waste = the volume of the prism
∴ The volume of the yard waste = 220 feet³
- The average weighs of it is 7.5 pounds/cubic foot
∴ The weight of the yard waste = the average of weight × the volume
∴ The weight of the yard waste = 7.5 × 220 = 1650 pounds
Two cars simultaneously left Points A and B and headed towards each other, and met after 2 hours and 45 minutes. The distance between points A and B is 264 miles. What is the speeds of the cars, if one of the cars travels 14 mph faster than the other?
The answer is:
[tex]FirstCarSpeed=41mph\\SecondCarSpeed=55mph[/tex]
Why?To calculate the speed of the cars, we need to write two equations in order to create a relation between the two speeds and be able to isolate one in function of the other.
So, let be the first car speed "x" and the second car speed "y", writing the equations we have:
For the first car:
[tex]x_{FirstCar}=x_o+v*t[/tex]
For the second car:
We know that the speed of the second car is the speed of the first car plus 14 mph, so:
[tex]x_{SecondCar}=x_o+(v+14mph)*t[/tex]
Now, we already know that both cars met after 2 hours and 45 minutes, meaning that positions will be the same at that moment, and the distance between A and B is 264 miles, so, we can calculate the relative speed between them.
If the cars are moving towards each other the relative speed will be:
[tex]RelativeSpeed=FirstCarSpeed-(-SecondCarspeed)\\\\RelativeSpeed=x-(-x-14mph)=2x+14mph[/tex]
Then, since from the statement we know that the cars covered a combined distance which is equal to 264 miles of distance in 2 hours + 45 minutes, we have:
[tex]2hours+45minutes=120minutes+45minutes=165minutes\\\\\frac{165minutes*1hour}{60minutes}=2.75hours[/tex]
Writing the equation, we have:
[tex]264miles=(2x+14mph)*t\\\\264miles=(2x+14mph)*2.75hours\\\\2x+14mph=\frac{264miles}{2.75hours}\\\\2x=96mph-14mph\\\\x=\frac{82mph}{2}=41mph[/tex]
So, we have that the speed of the first car is equal to 41 mph.
Now, substituting the speed of the first car in the second equation, we have:
[tex]SecondCarSpeed=FirstCarSpeed+14mph\\\\SecondCarSpeed=41mph+14mph=55mph[/tex]
Hence, we have that:
[tex]FirstCarSpeed=41mph\\SecondCarSpeed=55mph[/tex]
Have a nice day!
Ugh like terms. Help
Answer:
-4y - 7x^3 + 2
Step-by-step explanation:
So first lets combine the y terms together, doing this we get:
-4y + 1 - x^3 - 3x^3 + 1 - 3x^3
Now lets combine the terms with x^3 together
-4y + 1 - 7x^3 + 1
Lastly, lets add the constants
-4y - 7x^3 + 2
A baseball is thrown upward and its height after t seconds can be described by formula h(t)=−16t2+50t+5. Find the maximum height the ball will reach.
h(t) = -16t² + 50t + 5
The maximum height is the y vertex of this parabola.
Vertex = (-b/2a, -Δ/4a)
The y vertex is -Δ/4a
So,
The maxium height is -Δ/4a
Δ = b² - 4.a.c
Δ = 50² - 4.(-16).5
Δ = 2500 + 320
Δ = 2820
H = -2820/4.(-16)
H = -2820/-64
H = 2820/64
H = 44.0625
So, the maxium height the ball will reach is 44.0625
The maximum height the ball will reach is 81.25 feet.
Explanation:To find the maximum height the ball will reach, we can use the formula h(t) = -16t² + 50t + 5, where t represents time in seconds. The maximum height occurs at the vertex of the parabolic equation, which can be found using the formula t = -b/2a. In this case, a = -16 and b = 50. Plugging in these values, we get t = -50/(2*(-16)) = 1.5625 seconds.
Now, we can substitute this value of t back into the original equation to find the maximum height. h(1.5625) = -16(1.5625)² + 50(1.5625) + 5 = 81.25 feet. Therefore, the maximum height the ball will reach is 81.25 feet.
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