What’s the answer to this problem?

Alength on a map is 7.5 inches. thescale is 1 inch: 5 miles. what is theactual distance? a 1.5 miles c 12.5 milesb 2.5 miles d 37.5 miles

Add the two expressions 3.8b - 7 and 2.9b + 9 enter your answer in simplified form

If f(x) = 3x-2 and g(x) =2x+1 find (f-g)(x)