WILL MEDAL

AND FAN

An electrician charges $80 an hour for weekday repairs and $120 for nights and weekends. Last week, the electrician earned $4800 for 50 hours of work. Which system of equations can be used to find how many hours were worked on weekdays?
A) x + y = 50; 80x + 120y = 4800
B) x - y = 50; 50x + 120y = 4800
C) x - y = 50; 80x - 120y = 4800
D) x - y = 50; 80x + 120y = 4800

Question

WILL MEDAL

AND FAN

An electrician charges $80 an hour for weekday repairs and $120 for nights and weekends. Last week, the electrician earned $4800 for 50 hours of work. Which system of equations can be used to find how many hours were worked on weekdays?
A)	x + y = 50; 80x + 120y = 4800	
B)	x - y = 50; 50x + 120y = 4800	
C)	x - y = 50; 80x - 120y = 4800	
D)	x - y = 50; 80x + 120y = 4800

atildathehun · Answer

So if you look at the equations, if you are trying to to find how many hours he/she worked, why would you need to subtract hours in order to get to 50?

anonymous · Answer

You dont.. my first guess was a. Was that correct? (:

atildathehun · Answer

Oh, I see your problem. I was under thinking it sorry one second.

anonymous · Answer

?

anonymous · Answer

I do not understand.

atildathehun · Answer

I would go with a

anonymous · Answer

Explain?

atildathehun · Answer

B has a wrong constant in it. instead of 80 it is 50. C is subtracting the wages, which is not what we are wanting.

anonymous · Answer

D?

atildathehun · Answer

At the end of the prompt it say it wants to find how many hours were worked on weekdays. D has x and y subtracting, if you knew how many hours were worked at night and on weekends you would have to add to 50.