There are 630 dishes that need to be rinsed. boris can rinse them in 105 minutes by himself. it will take his friend reuben 70 minutes to rinse these dishes. how long will it take them if they rinse these 630 dishes together?

Boris:

105 mins = 630 dishes

1 min = 630 ÷ 105 = 6 dishes

Reuben:

70 mins 630 dishes

1 min = 630 ÷ 70 = 9 dishes

Boris and Reuben:

1 min = 6 + 9 = 15 dishes

Number of numbers needed to rinse 630 dishes:

630 ÷ 15 = 42 mins

They will take 42 mins if they rinse the 630 dishes together.

what is the graph

step-by-step explanation:

x =±sqrt(1/3)

step-by-step explanation:

x+4/6x=1/x

multiply each side by 6x to get rid of the fractions

6x*(x+4/6x)=1/x*6x

distribute

6x^2 +4 = 6

subtract 4 from each side

6x^2 +4-4 = 6-4

6x^2 =2

divide by 6

6x^2/6 = 2/6

x^2 = 1/3

take the square root of each side

sqrt(x^2) = ±sqrt(1/3)

x =±sqrt(1/3)