Question 321164
Helen earns $7.50 an hour at her job, but if she works more than 35 hours in a week she is paid 1.5 times her regular salary for the overtime hours worked. One week her gross pay was $352.50. How many overtime hours did she work that week?
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If she works 35 hours she gets 35*7.50 = $ 262.50
She got $ 352.50 that week.
so she got 352.50-262.50 = $ 90 extra for overtime 
She gets 1.5 times for every extra hour
so she gets 7.50*1.50= $11.25 per extra hour
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The extra amount she got was $ 90
so she worked for 90/11.25 extra hours
= 8 hours over time