Mary paid #13.60 on a hamster toy, and a cage cost her $14.90 with 2 $20 bills. she also found a dollar bill on the ground. how much change did she receive?

Aheated piece of metal cools according to the function c(x) = (.5)x ? 7, where x is measured in hours. a device is added that aids in cooling according to the function h(x) = ? x ? 2. what will be the temperature of the metal after two hours?

Explain how you can show five less than a number using an algebraic expression

Ashop has a sale that offers 20% off all prices. on the final day they reduce all the sale prices by 25% linz buys a ratio on the day. work out the overall percentage reduction on the price of the ratio