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prisoha [69]
2 years ago
5

Please help me answer number 11

Mathematics
1 answer:
horsena [70]2 years ago
8 0
Is this geometry or something else
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10. rhombus abcd has vertices at a(-2, 7), b(8, 7), c(2, -1), and d (-8, -1).
horrorfan [7]

Answer: 80

Step-by-step explanation:

We can use the formula A=\frac{d_{1}d_{2}}{2}, where d_{1}, d_{2} are the lengths of the diagonals.

By the distance formula,

AC=\sqrt{(-2-2)^{2}+(-1-7)^{2}}=\sqrt{16+64}=4\sqrt{5}\\BD=\sqrt{(-8-8)^{2}+(-1-7)^{2}}=\sqrt{256+64}=8\sqrt{5}

So, the area is \frac{(4\sqrt{5})(8\sqrt{5})}{2}=\boxed{80}

6 0
2 years ago
Find an equation of the line passing through the pair of points (2,3) and (5,9). Write the equation in the form Ax + By = C.
8090 [49]

Answer:

- 2x +  y  = - 1 , so the B is correct.

Step-by-step explanation:

+ Because of "the line passing through the pair of points (2,3) and (5,9)", that means the line has the equation y = ax + b where a = (9-3)/(5-2)= 6/3= 2

+ So the equation is y = 2x + b.

+ Then we replace x= 2 and y= 3 into y = 2x + b for finding  like:

3 = 2*2 + b or 3 = 4 + b, so we find b = 3 - 4 = - 1.

+ The equation of this line is y = 2x - 1 or in the form:

                                  2x - y - 1 = 0 (or -2x + y = -1)

Have a good day!

7 0
3 years ago
SOMEONE!!!<br><br> QUESTION: What is the measure of each angle in a regular polygon with 6 sides?
Setler [38]

Answer:

polygon do all the number times each outher divided in half then times 6 for the hight and langht

Step-by-step explanation:

8 0
3 years ago
marcus buys 10 containes of yogurt. Each container of yogurt is 2/3 cup. how many cups of yogurt does marcus buy
Ymorist [56]
6 2/3 cups


hope it helps!
6 0
3 years ago
Read 2 more answers
An envelope is 4 cm longer than it is wide. the area is 96 square centimeters. find the length and width.
Dennis_Churaev [7]
<span>So, L*W=A Because it is 4 cm longer, L=W+4 Because the area is 96, LW=96 Substitute to get W(W+4)=96 Multiply it out. W^2+4W-96=0 By solving the quadratic, W+12(W-8)=0 so either W+12 or W-8 is zero. The width must be positive, so the width is 8. Therefore the length is 12. 

  Hope this helps.</span>
4 0
3 years ago
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