Tony bought 3 packs of pencils for $4 each and pencil box for $7. Mario bought 4 binders for $6 each and used a coupon for $6 off. Write and evaluate expressions to find to find who spent more money.

How many grams must be adde to 970g to make 1 and a half kg

Prove that quadrilateral is a rhombus.

Type the correct answer in the box. consider the system of linear equations below. rewrite one of the two equations above in the form ax + by = c, where a, b, and c are constants, so that the sum of the new equation and the unchanged equation from the original system results in an equation in one variable.