The dry cleaning fee for three pairs of pants is $18. how much will it cost to clean 11 pairs of pants. explain how you use the constant of proportionality to solve the problem

If 10 men take 18 days to mow 60 acres of grass, how long will 15 men take to mow 80 acres?

Adj has a total of 1075 dance and rock songs on her system. the dance selection is 4 times the size of the rock selection. write a system of equations to represent the situation.

An investment decreases in value by 30% in the first year and decreases by 40% in the second year. what is the percent decrease in percentage in the investment after two years