Assuming each person gets the same amount of work done, each wall in the first scenario takes 8 minutes to paint. If 3 people paint 4 walls, then each person is painting 1 1/3 of a wall. We can use that to find out how long it takes one person to paint 1 1/3 walls:

$\frac{8min}{wall}*\frac{4}{3}walls=\frac{32}{3}min$ . Interpreting that, it takes each person 10 2/3 minutes to paint 1 1/3 walls.

If 4 people paint 7 walls, that means that each person is painting 7/4 walls, or 1.75 walls each. Using the fact that it takes 10.66666 minutes to paint 1.33333 walls, we can find out how many minutes it will take to paint 1.75 walls:

$\frac{10.6666}{1.33333}=\frac{x}{1.75}$ Cross multiply to get

18.666655 = 1.3333x so

x = 14.000 minutes

6 0

4 years ago

A team of paper selling for $2.19 marked up 11% on cost

ahrayia [7]

Answer:

$2.43

Step-by-step explanation:

2.19×0.11=0.2409

2.19+0.24=2.43

8 0

3 years ago

(6d – 10d3 + 3d2) – (5d3 + 3d – 4)

AnnZ [28]

Answer:

-4(9d-1)

Step-by-step explanation:

(6d-10d×3+3d×2)-(5d×3+3d-4)

(6d-30d+6d)-(15d+3d-4)

6d-30d+6d-15d-3d+4d

-36d+4

-4(9d-1)

5 0

3 years ago

How do i graph x+4y=8

Andrew [12]

Answer:

x = 8 y = 2

(8,2)

Step-by-step explanation:

You have to find the value of both x and y

x + 4y = 8

to find x you have to cancel out y so,

x + 4(0) = 8

x = 8

to find y you have to cancel out x

0 + 4y = 8

4y = 8

divide both sides by 4

y = 2

Hope this Helps!!!

6 0

3 years ago