Question:
Joanna earns money as a part-time receptionist according to the function j(x)=8x-2.35 where x is the number of hours she works.her father suggests tha joanna invest her earning in company whose quarterly payout is represented by the function p(x)=4x+28...what single function would represent the quarterly value of the investment of all of Joanna"s earnings in the company her father recommended~`~
It's too hard for me...= =...Thankyou for your help~~~~
Answer:
Let x in the first function equal the hours she works in a quarter. The x in the second function is equal to j(x) because that is the money that Joanna has. It is therefore:
p(x) = 4(j(x)) + 28
p(x) = 4(8x - 2.35) + 28
p(x) = 32X - 9.40 + 102
p(x) = 32x + 92.2
Check math, but that is how you do it.
In the first function, x represents the number of hours Joanna works. What is x stand for in the qtr. payout function? As shown, payout ($) could not be the result of 4 times hours + 28. Either I am missing something, or you haven't provided enough information.
make the x in the p(x) equation equal to the j(x) equation.
p(x)=4(8x-2.35)+28
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