Multiply you first equation by 2 to get 4x + 10y = 22
Now the x terms can be eliminated and cancelled out using elimination.
4x + 10y = 22
4x + 3y = 1

To eliminate you need to "subtract", so you need to multiply one of the equations by -1.

4x + 10y = 22
-4x -3y = -1
------------------
0 + 7y = 21
y = 3

Now plug 3 into either one of the equations to get x.

7 0

3 years ago

Which triangles are right triangles? Select all that apply.

Setler79 [48]

Answer:

triangle 1, triangle 3,

Step-by-step explanation:

Triangle 1= $14^{2} + 24^{2} = 772\\196+ 576 = 772$

Triangle 2= is wrong

Triangle 3= $11^{2} + 22^{2} = 605\\121+ 484= 605$

Triangle 4= is wrong.

7 0

2 years ago

Help please ill give extra to brainliest<br> 13d +8= -1<br><br> d=?

arsen [322]

Answer:

d = (-9/13)

Step-by-step explanation:

13d + 8 = -1

-8 -8

13d = -9

÷13 ÷13

d = ( -9/ 13 )

I hope this helps!

8 0

2 years ago

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