If it takes 3 hours to completely detail a car, at the same rate, how much of the job would be done in 1 hour and 20 minutes.

step-by-step explanation:

first, eliminate the parenthesis:

3

x

+

2

−

4

x

second, group like terms:

3

x

−

4

x

+

2

third, combine like terms:

(

3

−

4

)

x

+

2

→

−

1

x

+

2

→

−

x

+

2

the answer is 40.

proof:

answe: it will take 4.5 hours for naomi and clair to paint an equal number of square feet

hope i

-lavira : )