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Can anyone help
I need help with the steps to solve this
Looking at this, can you guess where to start?
What are the two elements that determine how much I would pay to have this plumbing company do work for me?
the plumbing and heating charges
Of course the charges, but what specifically about the charges? The problem statement gives you this info, "DG's Plumbing and Heating charges $50 plus $65 per hour for emergency service." What are the two components to the charge?
the house call and the emergency call?
Yes, but what are the "numbers" associated with that, remember that this is a math problem.
60 and 55
Okay, so what does it cost JUST to have them show up, to make a house call?
Yes, nice work. Okay, and what if they show up AND do 1 hour of work?
would it be 115
Perfect, now, how did you get that number? Write it out mathematically.
I added both the 50 and 65
Good, so how about mathematically, how would you write that out?
Where did the x come from?
What are you multiplying?
aw this isn't an equation
Technically it is an expression since there is no =
So try it again, how would you represent the process you used mathematically?
can you give me an example of an expression
All of these are expressions. 1+2 5-2 12*2 4/1
ok I thought it was something different so 50+65
Excellent, that is exactly right. So now, how much would it cost if I had the plumber show up AND do 2 hours of work?
Good, can you write out, mathematically, how you got it?
Good, how could you break up the hourly charge?
50+1 hour(65)=110 50+2 hours(130)=180
That is a good start, what are you expressing with the 2 hours(130)?
the emergency service
What about writing it like this: 50+1*(65)=110, 50+2*(65)=180? You are expressing that there is a $50 charge plus $65 for each hour.
How about if I had them come over AND do 5 hours of work?
would I multiply by 5
Yes, like you did with the 1 and 2
so it would be 250 and 325
Where did you get the 250?
I multiplied 50*5
Why? Did you do that when you had these equations? 50+1*(65)=110, 50+2*(65)=180
Okay, so why would you do it now? :)
I wouldn't multiply I would add
So what would your equation look like?
so would I add 50 dollars 5 times and 65 dollars 5 times?
You have "times" in there twice, what components do you have to pay for each of the 5 hours?
50 and 65
What you are doing here is looking at what you have to pay for each hour that the service is there. Just to have them come out costs you $50, then, every hour you are charged $65. You are not charged a call-out fee every hour, you only pay that once. That is why you "add" the call-out fee.
Think about what is actually happening, and try to apply that to your equation to see if it fits.
aw ok so it's only 65
Yes, because that is the hourly rate, that is what you are charged for each hour they are there. You do not need to pay a call-out every hour.
What would the three equations look like if I asked you to tell me what it cost to have the plumbers there for 2, 3, and 4 hours?
I believe that you need to work on the basics a little more. This site has games and tips from pre-algebra up through calculus. Give it a look: http://www.coolmath.com/index.html