I have 2 word problems in my homework that I don't know how to do..... u.u I'm studying special functions in school would any one help me please? ;D I need to find out how to do them in case we have a test later on D: at least the second one..... xD
What type of funcion is f(x) = -2
A phone company charges for service as follows: they charge a certain amount for a visit and then they charge a certain amount per hour after that. If a 3-hour service visit costs $220 and a job that takes an hour and a half costs $145, how much is the cost of a visit before the amount of time spent is favored in?
What type of funcion is f(x) = -2
A phone company charges for service as follows: they charge a certain amount for a visit and then they charge a certain amount per hour after that. If a 3-hour service visit costs $220 and a job that takes an hour and a half costs $145, how much is the cost of a visit before the amount of time spent is favored in?
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1
f(x) = -2 is a constant function. To every x in its domain, f assigns the value -2.
#2
Let x denote the visit charge (in dollars)
Let y denote the per-hour charge (in dollars)
From the given information,
x + 3y = 220
x + 1.5y = 145
You are asked for the value of x. So multiply the second equation by 2 and subtract the first equation from the result:
2x + 3y = 290
x + 3y = 220
x = 70
f(x) = -2 is a constant function. To every x in its domain, f assigns the value -2.
#2
Let x denote the visit charge (in dollars)
Let y denote the per-hour charge (in dollars)
From the given information,
x + 3y = 220
x + 1.5y = 145
You are asked for the value of x. So multiply the second equation by 2 and subtract the first equation from the result:
2x + 3y = 290
x + 3y = 220
x = 70