Two people working together can mow a lawn in 72 minutes. When working separately, one person can mow the lawn one hour faster than the other. How much time would it take for

each person to mow the lawn when working separately?

7.53 hrs for the faster man and 8.53 hrs for the slower man.

positive

step-by-step explanation:

the quadrant is facing upwards

hello from mrbilldoesmath!

answer:

(7 x + 6 y) (49 x^2 - 42 x y + 36 y^2)

discussion:

the trick is to recognize that 343 = 7^3 and 216 = 6^3 and, in general,

a^3 + b^3 =   (a + b) (a^2 - a b + b^2).

in our case

343x^3+216y^3   =   (7x)^3 + (6y)^3

so take a = 7x and b = 6y in the above equation to get the answer.

you,

mrb