A water balloon is thrown from a window. The height of the balloon can be found using the equation

y = -7.5x + 45, where x is the time in seconds the balloon has been in the air.

How many seconds will it take for the balloon to hit the ground?

1 answer

To find the time it takes for the balloon to hit the ground, we need to find the x value at which y = 0.

Setting y = 0 in the equation, we have:
0 = -7.5x + 45

Rearranging the equation, we get:
7.5x = 45

Dividing both sides by 7.5, we get:
x = 45 / 7.5

x = 6

Therefore, it will take the balloon 6 seconds to hit the ground.