Gilda drove 650miles at an average speed of 50 miles per hour. how many miles per hour faster would she have had to drive in order for the trip to have 1 hour less?

A. 127 cm^2 b. 144.5 cm^2 c. 172 cm^2 d. 50 cm^2

For what values of the variable x is the expression square root of 7x+14+ square root of 7-x a real number?

Acomputer store buys a computer system at a cost of $370.80. the selling price was first at $ 618, but then the store advertised a 20 % markdown on the system. answer parts a and b. a. find the current sale price.