Question

The altitude of a plane as it begins to descend is shown by the linear equation a = 28,500 – 1800m, where a is the plane’s altitude, in feet, and m is minutes. What is the plane’s altitude when m = 9? ___ ft

help me plz

Answer 1

We substitute m=9 in a=28500-1800m

a = 28500 - 1800(9) = 28500 - 16200 = 12300

Answer: 12,300 feet