20 points for each question
what is the simplified value of the expression below?
12.4*(-6.3)

–78.12

–1.97
1.97
78.12

tamir buys tickets to two concerts this season. one has a face value of $32.50, and one has a face value of $26.50. he uses a coupon and gets both tickets at 1/4 off. if he pays with a $50 bill, how much change should tamir receive?
$5.75$7.63$30.13$44.25


What are “like terms”? why can we only add like terms?

Imogene invested $8,000 in a bank account that pays 8 percent simple interest at the end of each year. her friend invested the same amount in stocks where the growth of the investment is represented as 2,000 times the square root of 2 less than the time lapsed in years. if y1 and y2 represent the amount earned in dollars and t is the time lapsed in years, which system of equations correctly represents the situation?

Which expression can be used to determine the slope of the line that passes through the points -6, three and one, -9