Question

ok, just need verification on this one, jack can mow his lawn in 3 hours, sara can mow it in 6, how many hours would it take working together? i got 2. is this right?

Answer 1

wrong! :(

Answer 2

whaaaaaa!! help!

Answer 3

Call 911 asap for help!

Answer 4

lol

Answer 5

\[\frac{1}{3} + \frac 16 = \frac 1x\]

Answer 6

solve for x.

Answer 7

jack working for 1 hour can mow 1/3 of his lawn
at same time sara mows 1/6
that should help
ogether they have mown 1/2 the lawn

Answer 8

shouldn't it be x/3 + x/6 = 1?
simplify to 3x+6x=18

Answer 9

9x=18
x=2?

Answer 10

Nope! :(

Answer 11

What Jimmy said is a very good way to think about it: think about rates of doing things. Saifoo is saying the same thing as well, but perhaps slightly less obvious.

Answer 12

so 2 hours is right then, if according to jimmy it takes 1 hour for the to mow 1/2 the lawn together, it will take them 2 hours to mow the whole thing!