Homework Help: Math (Basic)

Posted by Kai on Friday, June 24, 2011 at 1:15pm.

"A woman earns 10.00 per hour at her job, but if she works more than 20 hours in a week she is paid 1.5 times her regular salary for the overtime hours worked. One week her gross pay was 275. How many overtime hours did she work that week?

Express your answer in hours to 2 significant figures."

I'm not sure how to start the problem. I tried something like:

10(h) + ??? = 275 hours but that doesn't seem like the right equation.

Math (Basic) - Reiny, Friday, June 24, 2011 at 1:25pm
let the number of overtime hours be x

275 = 10(20) + 15x
solve for x

I got x = 5

check
20 hours at $10 = 200
5 hours at $15 = 75
total = 275 , yeahhh
Math (Basic) - Kai, Friday, June 24, 2011 at 1:36pm
Where did you get the 15x from?
Math (Basic) - Reiny, Friday, June 24, 2011 at 1:39pm
what is 1.5 of $10 ?

20 hours at $10 = 20(10) = 200
x hours at $15 = x(15) = 15x
Math (Basic) - Kai, Friday, June 24, 2011 at 1:40pm
Oh I see. Thank you!

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