Question

average cost (per bookcase) of manufacturing x bookcases is given by the rational function: c(x)=40x+5100/x. Find the number of bookcases that must be manufactured if the average cost is 77.00 per bookcase

Answer 1

Try to equate \(c(x) \) with 77. We get an equation which looks like \[77 = 40x + {5100 \over x} \] Can you solve?

Answer 2

May I ask if it is \[ 40x + {5100 \over x} \text{ Or } {40x + 5100 \over x}\]

Answer 3

2nd one

Answer 4

All right.\[77 = {40x + 5100 \over x} \]Solve.

Answer 5

when it is like this can I cancel my "x" on the numb. and deno?