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Wittaler [7]
2 years ago
15

25 points pls help this is really hard

Mathematics
2 answers:
Katarina [22]2 years ago
8 0

Answer:

10

Step-by-step explanation:

you do step by step math and after you do that you will get 10

Mariana [72]2 years ago
3 0

Answer:

10

Step-by-step explanation:

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4x-2y=-12 multiples by -1
Yuliya22 [10]

Answer: -4x+2y=12

Step-by-step explanation:All you have to do is multiply the variables one after the other taking note of the sign

8 0
3 years ago
What is the answer to 56/-8?
mina [271]

Answer:

-7

Step-by-step explanation:

5 0
3 years ago
Prove the trigonometric identity!<br><br> Please help!! 50 Points!
Rudiy27

Answer:

:)

Step-by-step explanation:

For simplicity I will substitue x for β.

1-sin(2x)=(cosx-sinx)^2\\1-2sin(x)cos(x)=cos^2x-2sin(x)cos(x)+sin^2x\\1=cos^2(x)+sin^2(x)\\1=1

In the first step I used the identity

sin(2x)=2sin(x)cos(x)

And I factored out (cosx-sinx)^2

Then it's just simple algebra to cancel till the 3rd step where we used another identity derived from the Pythagorean Theorem.

cos^2(x)+sin^2(x)=1

That's it!

3 0
2 years ago
jordan is cutting a 2 m by 1 1/4 m piece of rectangular paper into two pieces along its diagonal. find the area of each of the p
alexdok [17]

Answer:

The area of a rectangle is 5/4

Step-by-step explanation:

5 0
2 years ago
I need to know question 8 I’m confused
marissa [1.9K]

Remark

Let the pigs = p

Let the chickens = c

Givens

30 heads is another way of saying that there were 30 creatures in the barnyard. In addition each chicken has 2 legs and each pig has 4

c + p = 30

2C + 4P = 100       (2) Divide (2) by 2

C + 2P = 50           (3)  Subtract (1) from (3)

<u>C + P    = 30</u>

       P  = 20

So there were 20 pigs.

3 0
2 years ago
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