Answer:
13
Step-by-step explanation:
20-7 hope this helps :)
Replace b in the equation with 20 and solve.
B-7 = 20-7 = 13
The answer is 13
slope = ⅔
y intercept = -2
so
interior angles are /_3,/_4,/_5 and /_6
7/25,3/10, 24.40%,37.60%