-14 =-20 y- 7x
10y + 4 = 2x

How do I work this out?

-14 =-20 y- 7x...Call this A

10y + 4 = 2xCall this B

Use the substitution method.

Solve B for y and then plug into A.

10y + 4 = 2x

10y = 2x - 4

y = (2x - 4)/10

-14 =-20(2x - 4)/10 - 7x

Solving for x, I get 2.

To find y, plug x = 2 into A or B.

10y + 4 = 2(2)

10y + 4 = 4

10y = 4 - 4

10y = 0

y = 0/10

y = 0

x = 2, y = 0

answer:

okay well it's a rectangle i know that for sure for number 11 lol, its a quadrilateral bcs it has 4 sides, its a parallelogram bcs it has 2 pairs of parallel sides and those are the answers that i can see

12 is a square

Step-by-step explanation:

hope this helps