Include all steps to (remember the x's are variables) (3 – 6x5 – 8x4 ) − (−6x4 – 3x – 8x5)

Hello kiddio!

The answer is 

8x5+6x4−59x+3

Distribute the Negative Sign:=3−6x(5)−8x(4)+−1(−6x4−3x−8x5)=3+−30x+−32x+−1(−6x4)+−1(−3x)+−1(−8x5)=3+−30x+−32x+6x4+3x+8x5

Combine Like Terms:=3+−30x+−32x+6x4+3x+8x5=(8x5)+(6x4)+(−30x+−32x+3x)+(3)=8x5+6x4+−59x+3

Have a nice day

t = 1 hour

Step-by-step explanation:

Oddly the distances add. Each plane will contribute a certain distance to make the 450 km. They will meet after the same number of hours have passed.

d = r * t

r1 = 240 km/hour

t1 = t

r2 = 210 km/hour

t2 = t

240*t + 210*t = 450     collect the terms on the left.

450t = 450                   divide by 450

450t/450 = 450/450

t =1

After 1 hour they will meet.