3 years ago

QUICK ANSWER!!! THIS IS FOR 50 POINTS!!!!

Mathematics

1 answer:

Inessa05 [86]3 years ago

4 0

1can go in many numbers

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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 $\frac{(4\sqrt{5})(8\sqrt{5})}{2}=\boxed{80}$

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2 years ago

Leah likes the number 400 but not 500. She likes 900 but not 999.

Natali [406]

Answer:

Step-by-step explanation:

1,200

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3 years ago

What is the address of the element 14 in Matrix D

MAXImum [283]

Answer:

A.)D23

Step-by-step explanation:

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3 years ago

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Number 7, please help me

MariettaO [177]

Answer:

oh dang.. imma head out, no big brain time for me..

Step-by-step explanation:

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3 years ago

SOLVE THIS PROBLEM, PLEASE! :(

pashok25 [27]

Answer:

1st Blank: 5

2nd Blank: 3

3rd Blank: -8

4th Blank: -8

5th Blank: 12

Step-by-step explanation:

15x+35y=-100

-15x+9y=-252

___________

44y=-352

___ ___

44 44

y=-8

3x+7(-8)=-20

3x-56=-20

+56 +56

__________

3x=36

__ __

3 3

x=12

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3 years ago