Move the dot to -7 on the number line

The parabola y = x² - 4 opens: a.) up b.) down c.) right d.) left

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

Sam opened a money-market account that pays 3% simple interest. he started the account with $7,000 and made no further deposits. when he closed the account, he had earned $420 in interest. how long did he keep his account open?