Posted by **mi** on Thursday, September 2, 2010 at 12:14pm.

tom was paid $4.50 per hour for painting a fence and $ 6.50 per hour for mowing grass. He worked 7 hours and earned $39.50. How many hours did it take him to paint the fence/

- math -
**George**, Thursday, September 2, 2010 at 1:07pm
the best way to go about this question is trial and error. if he worked 7 hours and made 39.50, then if he works 3 hours painting the fence, and 4 hours mowing the grass then he makes 39.50.

i'm sure you can make equations for it but it's much quicker and easier to go about this question this way.

- math -
**mi**, Thursday, September 2, 2010 at 1:21pm
my 6th grade grandaughter needs an equation. than you.

- math -
**mi**, Thursday, September 2, 2010 at 1:41pm
george can you give me some additional help. thanks

- math -
**Jen**, Thursday, September 2, 2010 at 1:53pm
x+y=7

4.5x+6.5y=39.5

Multiply the top equation by -4.5 to cancel the x's:

-4.5x-4.5y=-31.5

4.5x+6.5y=39.5

2y=8

y=4

Put that back in the first equation to solve for x.

- math -
**Jen**, Thursday, September 2, 2010 at 1:54pm
You do NOT want to attempt this problem by trial and error.

- math -
**George**, Thursday, September 2, 2010 at 2:09pm
I feel i may have stepped on some toes. I am sorry for that. I am not the most intelligent person in the world and I sincerly appoligize.

- math -
**Jen**, Tuesday, September 7, 2010 at 10:17pm
No need for an apology, George. I was simply saying that it's not the best method. :)

## Answer This Question

## Related Questions

- math - last week Coughy worked 4 hours more than Achewy. she also worked twice ...
- math - A man can paint a fence in 8 hours. Another man can paint that fence in ...
- Math - If Sally can paint a house in 4 hours, & John can paint the same house in...
- help with math! - Evonne earns $10.50 per hour for a 40 hour week. She earns ...
- painting - Joe had eight sections of fence to paint. He painted 2/3 of each ...
- algebra - Mike works part-time at a grocery store. He also mows lawns to earn ...
- Math - Last week Frank worked as a waiter for 6&1/4 hrs, earning $9.80 per hour...
- Math - Last week Frank worked as a waiter for 6&1/4 hrs, earning $9.80 per hour...
- MATH - Could someone please double check me...
- math - a paint supplier has two machines that prouce both indoor paint and ...

More Related Questions