If B = − 3 x − 7 x 2 B=−3x−7x 2 and C = − x 2 − 8 − x , C=−x 2 −8−x, find an expression that equals 3 B − 3 C 3B−3C in standard form.

Astore ordered 750 candles a total wholesale cost of $7910.20. the soy candles cosy $12.17 each and thespecialty candles cost $9.58each. how many of each were bought?

How many kilograms of a 5% salt solution and how many kilograms of a 15% salt solution must be mixed together to make 45kg of an 8% salt solution?

Which value of y will make the inequality y< -1 false?