Chelsea spotted a hot-air balloon at an altitude of 800 feet. It appeared to be descending at a rate of 30 feet per minute.

Write an equation to describe the functional relationship between the height of the balloon, h, and m, the number of minutes.

Sandy can assemble a chair in 0.5 hour and a table in 0.75 hour. She works 8 hours each day.

Write an equation that describes the number of chairs, c, and t, the number of tables Sandy can assemble in one day.

A greyhound puppy weighs 12 pounds. He is gaining 1.5 pounds a week.

Write an equation to describe the relationship between the number of pounds gained in x weeks and y, the puppy's total weight.

Corey works at a sporting goods store. He is paid $10 an hour plus a 6% commission on his total sales.

Write an equation that describes the relationship between e, Corey's total weekly earnings if he works 30 hours and has total sales of s dollars.