X^2=81/100 solve the equation for x

What value of x is in the solution set of 4x - 12 s 16 + 8x? -10 -9 -8 -7

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.

Solve the system of equations using the linear combination method. {4x−3y=127x−3y=3 enter your answers in the boxes.