Question

Sanford can assemble a computer in 60 minutes. Colleen can assemble a computer in 40 minutes. If they work together, how many minutes does it take them to assemble a computer?

Answer 1

1/40 + 1/60 = 1/x

where x is the number of minutes its takes for them to complete the work together

Answer 2

100 is not an answer

Answer 3

each fraction on the left is the part of the work each completes in 1 minute
The sum of these 2 fractions = 1/x - the fraction they complete when working togethher

Answer 4

I know because x = 100 is not a solution of the equation

Answer 5

20?

Answer 6

To solve this equation multiply each term by the LCD of the 3 fractions which is 120x

Answer 7

Its not 20

Answer 8

-.-

Answer 9

try and solve the equation

Answer 10

100/120=5???

Answer 11

No multiply each term by 120x