Matt and anna killian are frequent fliers on fast-n-go airlines. they often fly between two cities that are a distance of 800 miles apart. on one particular trip, they flew into the wind and the trip took 2.5 hours. the return trip with the wind behind them, only took about 2 hours. find the speed of the wind and the speed of the plane in still air. the wind speed is __ mph.

c

step-by-step explanation:

the polynomial is a perfect square trinomial of the form a^2-2ab+b^2:

option a. true

step-by-step explanation:

9x^2-12x+4

comparing with the form a^2-2ab+b^2

1.) a^2=9x^2

solving for a: square root both sides of the equation:

sqrt(a^2)=sqrt(9x^2)

a=sqrt(9) sqrt(x^2)

a=3x

2.) b^2=4

solving for b: square root both sides of the equation:

sqrt(b^2)=sqrt(4)

b=2

to be a perfet square trinomial 2ab must be equal to 12x. let's check:

2ab = 2 (3x) (2)

2ab = 12x

correct

answer:

24pi or letter c