2a+5b+7,8a-7b+4,-5a-8b-4​

Which rational number could be graphed between -4 and -5

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.

Find the rate of change for the situation.you run 7 miles in one hour and 21 miles in three hours.