Answer:
It's linear
Step-by-step explanation:
Linear equations have no exponents higher than a 1, which is the case for this equation cause if there's no exponent it's cause it's just a 1. Non-linear has a exponent higher than a 1, ex. 
Answer:
7(2f-3)
No step-by-step explanation.Sorry!
Answer:
28+14.50+524.50+13.25= 580.25
Step-by-step explanation:
Add it all together.
69, 70, 71, and 72
69 and 71 are the first and third digits. 69+71=140