How do you find f(50)-f(20) if f(x) = x2 + 4x - 7

Find the simple interest earned to the nearest cent for each principal, interest rate, and time 735 7% and two and a half years

Avegetable garden and a surrounding path are shaped like a square together are 12 ft wide. the path is 1 feet wide. if one bag of gravel covers 8 square feet, how manu bags are needed to cover the path? round your answers to the nearest tenth.

Anumber cube is rolled two times in a row. find the probability it will land on 2 on the first roll and a number greater then 4 on the second roll