Answer:

Step-by-step explanation:
Since g(x)=0, you input 0 into every x

Which then becomes:

Take out the 0 and there's your answer
Answer:
x=52
Step-by-step explanation:
90+34
124
180 (sum of all interior angles) - 124
56
x+72+56=180 (straight line)
x+128=180
-128 -128
x=52
*replace to verify*
52+72= 124
124+56= 180 (straight line)
Oh that question
Parallel sides
Opposite sides are congruent
And diagonals bisect each other
Since they are both equal to y, you can set -7x and x+8 equal to each other.
- 7x = x + 8 and solve for x then use what you got for x to solve for y