PLEASE HELP

The altitude of a plane as it begins to descend is shown by the linear equation
A = 22,000 - 800m, where A is the plane's altitude, in feet, and M is minutes.
What's the planes altitude when M = 12?

Question

PLEASE HELP

The altitude of a plane as it begins to descend is shown by the linear equation 
A = 22,000 - 800m, where A is the plane's altitude, in feet, and M is minutes.
What's the planes altitude when M = 12?

cwrw238 · Answer

just  replace m in the equation by 12 and work it out

A = 22,000 - (800*12)

cwrw238 · Answer

work out what's in the brackets first

anonymous · Answer

so i multiply 800 x 12?

cwrw238 · Answer

do that first then subtract your answer from 22,000

anonymous · Answer

ohhhh okay thank you so much

cwrw238 · Answer

yw