Al can wash a car in 40 minutes, Bob can wash a car in 30 minutes, and Carl can wash a car in 60 minutes. How long, in minutes, would it take them to wash a car, working together?

answer

d. 10

explanation

the distance from point y to wx is the height of the triangle.

using pythagoras theorem,

group similar terms to get,

this implies that,

take positive square root of both sides to get,

this implies that,

10.416 m/s

step-by-step explantion:

distance=100m

time= 9.6s

average speed=100/9.6

=10.416 m/s

80x^8−68x^6+16^5−20x^4−4x^3+8x^2

hope i'm right lol

your answer is -9

step-by-step explanation: