I dont know how to answer number 12 but number 13 is the first one 3x + 15 = 17
Answer: 3x - 6 (in^2)
Step-by-step explanation:
base * height / 2
=
3 ( 2x - 4) / 2 (in^2)
= 3x - 6 (in^2)
Answer:
75
