Glenn works as an office clerk and his job pays him $12 per hour. shelia works as a cashier and her job pays her $13.50 per hour. together, they worked 55 hours and earned a total of $705. how many hours did glenn work in his job? a. 20 b. 30 c.35 d.25

We can plug in Glen's hours to fin out which one is correct.

Let's try it:
He worked 20 hours for 12 a hour.
Shelia worked 35 hours for 13.50 a hour.

If we multiply them both and it equals 705, then the answer will be correct.
20*12= 240     35*13.50= 472.5 Together, they add up to 712.5. A is not the right answer.

Next one: 
I'm going to try D. 

25*12= 300
30*13.50= 405
Add them together, and you have 705.

D is the correct answer. 

I hope this helped you.

Brainliest answer would be appreciated. 

The discount is 8.70 . you dont tell us the percent of tax added so there is no way to find out, unless i'm not seeing anything. without tax its 37.70