Simplify 6m2n3 – 3m3n2 + 8m2n3 + 12m3n2

Cody was 165cm tall on the first day of school this year, which was 10% taller than he was on the first day of school last year.

X+y=-4 x-y=2 use elimination with adding and subtraction

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.