Question

Equation: y= -20x+800

How long will it take the balloon to descend to an altitude of 20 feet? How long will it take the balloon to land

Answer 1

37 seconds to 20 feet, 40s to land

Explanation:

1. Substitute 20 as your y value. Values like height are typically y values.

2. 20=-20x+800

3. subtract both sides by 800

4. -740=-20x

5. Divide both sides by negative 20

6. x=37

7. repeat, but put 0 feet for landing

Hopefully you understand now!