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prohojiy [21]
3 years ago
12

Ricky can paint a room in 4 hours. carrie can paint the same room in 3 hours. working together, how long would it take them to p

aint the room?
Mathematics
1 answer:
olga nikolaevna [1]3 years ago
6 0
R can pain the room in 4 hours, C can paint the room in 3 hours
Both can paint the room in  1/ (1/3 + 1/4) hours
=12/7 hours
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Your friend is trying to see if you can guess the two numbers she secretly has written on her paper. Your friend tells you that
DaniilM [7]

Hello,

First we work out the equations:

x + y =62 will be the first equation.

2x= y +13 is the second equation.

We can first rewrite the second equation as 2x – y =13.

So we have:

x + y = 62

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KEEP IN MIND: With y being positive in one of the equations and negative in the other, we can combine the equations to quickly eliminate y and solve for x.

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