Clarence is 42 inches tall. His brother Charlie is 37 inches tall. How much taller is Clarence?

Solve -.016x= -16. need solving this

I'm at a bookstore with $\$35$ in my pocket and a $20\%$-off coupon. what is the cost of the most expensive book i can buy with my money and the coupon? (assume that there are books of every possible price in the bookstore. it's a large bookstore! )

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