What is the additive inverse of the polynomial –9xy2 + 6x2y – 5x3? –9xy2 – 6x2y + 5x3
–9xy2 – 6x2y – 5x3
9xy2 + 6x2y + 5x3
9xy2 – 6x2y + 5x3

Your food costs are $5,500. your total food sales are $11,000. what percent of your food sales do the food costs represent?

How long must $542 be invested at a rate of 7% to earn $303.52 in interest? in a easier way

How many liters of peroxide should be added to 12 liters of an 8% peroxide solution so that the resulting solution contains 16% peroxide?   original added new amount of peroxide 0.96 liters x 0.96 + x amount of solution 12 liters x 12 + x 0.18 liter 1.14 liters 1.92 liters 2.10 liters