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marta [7]
4 years ago
10

Britton rotated trapezoid ABCD 180° on the coordinate plane. If angle B is 20° and angle D is 90°, what is the degree measuremen

t of angle B′?
Mathematics
2 answers:
MariettaO [177]4 years ago
8 0

Answer:

B' is 20 degrees

Step-by-step explanation:

the angle does not change when its rotated it will only change when its dilated when rotated the (x,y) symbols change not the angle measurements

olasank [31]4 years ago
6 0

Answer:

The answer is 20 degrees

Step-by-step explanation:

A trapezoid is a quadrilateral with four angles and the sum of the four angles is 360 degrees.

Britton rotated the trapezoid ABCD 180º, but we were not told that he tampered with the angles size or shape, we can now agree that it is still the same trapezoid that was rotated without any alterations in angles, size and shape.

Since we've been given that the angle B is 20º, and the measurement was not altered when rotating the trapezoid. Therefore the angle B' will also be 20º.

I hope this helps.

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Shayna's school is selling tickets to a play. On the first day of ticket sales the school sold 13 senior citizen tickets and 13
jasenka [17]

The price of one senior citizen ticket is 8$ and one student ticket is 12$.

<h3>What is the equation?</h3>

The equation is defined as mathematical statements that have a minimum of two terms containing variables or numbers that are equal.

Let the price of one senior citizen ticket = x

And the price of one student ticket = y

Given that, on the first day of ticket sales, the school sold 13 senior citizen tickets and 13 student tickets for a total of $260

The school took in $212 on the second day by selling 13 senior citizen tickets and 9 student tickets.

13x +13y = 260

13x + 9y = 212

Subtract the equation  from first

13x +13y - (13x + 9y) = 260 - 212

4y = 48

y = 48/4

y = 12

Substitute the value of y in the equation 13x + 9y = 212

13x + 9(12) = 212

13x + 108 = 212

13x = 212 - 108

13x = 104

x = 104/13

x = 8

Hence, the price of one senior citizen ticket is 8$ and one student ticket is 12$.

Learn more about the equation here:

brainly.com/question/10413253

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6 0
2 years ago
there are two factors of -36 such thatone factor is 11 less than half of the other factor. choose all the pairs of these factors
aleksandrvk [35]
Let one factor be x. Second factor is 11 less than half of this factor, so second factor will be (0.5x - 11). The product of these two factors is -36.

So,

-36=x(0.5x-11) \\  \\ &#10;-36=0.5 x^{2} -11x \\  \\ &#10;-72= x^{2} -22x \\  \\ &#10; x^{2} -22x+72=0 \\ \\ x^{2} -18x-4x+72=0 \\  \\ &#10;x(x-18)-4(x-18)=0 \\  \\ &#10;(x-4)(x-18)=0 \\  \\ &#10;x=4, x=18

If,
x = 4, the other factor will be = 0.5(4) - 11 = - 9
If,
x = 18, the other factor will be = 0.5(18) - 11 = -2

So, there are two possible set of factors.
1) 4 and -9
2) -2 and 18

From these -2 and 18 is available in the options. So this is the correct answer. 
7 0
4 years ago
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saveliy_v [14]
Hello there! ^-^ 

To solve, do the following. 

2n + 6 = 8n and 6n - 2 = 4n 

I think you can take it from here ;) 

If not just simply message me

7 0
4 years ago
The time (t) it takes for a group of volunteers to construct a house varies inversely as the number of hours (h). If 20 voluntee
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Answer:

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Step-by-step explanation:

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3 years ago
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yuradex [85]

Answer:

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