Please I need this Eva reads 25 pages per hour. Which expression represents the number of pages she reads in h hours?

For which pair of functions is (gof)(a)=|a|-2?

For f(x)=2x+3 and g(x)=x^2- 8 find (f+g) (x)

If 30 lb of rice and 30 lb of potatoes cost ? $27.60? , and 20 lb of rice and 12 lb of potatoes cost ? $15.04? , how much will 10 lb of rice and 50 lb of potatoes? cost?