Question

a helicopter descends until it reaches the ground. The equation y = -300x + 1200 gives the height, y, in feet, x minutes after the pilot begins the descend.

how long does it take to reach the ground

1. thuhuong
facundo3141592Ace12.2K answers78.3M people helpedSolving a linear equation we conclude that the helicopter will take 4 minutes to reach the ground.How long does it take to reach the ground?We know that the equation that models the height of the helicopter is:y = -300*x + 1200Where y is the height and x is the time in minutes.The helicopter will reach the ground when y = 0, then we need to solve:0 = -300*x + 1200Now we can solve this linear equation for x, it will give:300*x = 1200x = 1200/300 = 4x = 4Then, we conclude that the helicopter will take 4 minutes to reach the ground.If you want to learn more about linear equations
Step-by-step explanation:

2. vankhanh
Solving a linear equation we conclude that the helicopter will take 4 minutes to reach the ground.

### How long does it take to reach the ground?

We know that the equation that models the height of the helicopter is:
y = -300*x + 1200
Where y is the height and x is the time in minutes.
The helicopter will reach the ground when y = 0, then we need to solve:
0 = -300*x + 1200
Now we can solve this linear equation for x, it will give:
300*x = 1200
x = 1200/300 = 4
x = 4
Then, we conclude that the helicopter will take 4 minutes to reach the ground.