Asked by mi

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/
Answered by George
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.
Answered by mi
my 6th grade grandaughter needs an equation. than you.
Answered by mi
george can you give me some additional help. thanks
Answered by Jen
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.
Answered by Jen
You do NOT want to attempt this problem by trial and error.
Answered by George
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.
Answered by Jen
No need for an apology, George. I was simply saying that it's not the best method. :)
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