Question

Could use some help setting this up please. Medal.

Answer 1

@DebbieG

Answer 2

625 = 60E + 10A
A = E - 4

I bet you can do it from here.

Answer 3

Eng rate = 60/hr
astnt rate=10/hr
total = 625
astnt hours = eng hours -4

Like @creeksider showed you, you can model all of that with two equations: 1 for the total cost (eng rate x eng time + astnt rate x astnt time) 1 for the relationship between the eng time and the astnt's time.

Answer 4

ok so the first formula

625 = 60E + 10A

625 is number job cost got that and 60 is how much money engineer makes per hour E being his hours so fourth with assistant

now second formula A is hours assisted worked while E is hours engineer worked and we subtract it by 4 because the assistant worked less then 4 hours.

I am not sure how to start next step, multiple -60E to get rid of the hours worked by engineer?

Answer 5

Since the 2nd equation is already "A=...." you can just substitute that expression for A into the first equation, where you have the A.

Then you get 1 equation in 1 unknown (E) which you can solve for that variable.

Then substitute the value for E back into either of the equations (the 2nd one is the simplest) to get the value for A.

Answer 6

so he worked 9.5 hours? Meaning the assistant worked 5.5 hours?

Answer 7

Check it yourself to see if this is the right answer. What would the customer be billed if the engineer worked 9.5 hours at $60 per hour, and the assistant worked 5.5 hours at $10 per hour?

Answer 8

Yes I got the right answer thanks