Craig and Tom, working together, can clean the house in 8 hrs, working alone, Tom takes four times as long as Craig, How long does it take Craig to clean the house?

Let x = Craig's time

Let y = Tom's time

Create a system of equations to solve this problem.

8 = x + y

y = 4x

Substitute 4x into the y variable in the first equation.

8 = x + 4x. Combine like terms

8 = 5x. Divide each side by 5.

1.6 = x

Craig takes 1.6 hours to clean the house

answer: if you weigh 60 pounds on earth, on the moon you will weigh about 10 pounds. if you weigh 120 pounds on earth, you will weigh about 20 pounds on the moon. since weight is caused by the mass of two objects that are near each other, the bigger the objects, the more the force of gravity.

step-by-step explanation: if you weigh 60 pounds on earth, on the moon you will weigh about 10 pounds. if you weigh 120 pounds on earth, you will weigh about 20 pounds on the moon. since weight is caused by the mass of two objects that are near each other, the bigger the objects, the more the force of gravity.

$12. that is my answer.