Question

A company that sells phones generates revenue given by the function
r(x) = x^2 + 20x + 50 (where x is the number of phones produced per month). The cost of production is given by the function c(x) = 50x + 30. Which function gives the profit earned by the company?
x^2 + 70x + 80
x^2 + 70x + 20
x^2 – 30x + 20
x^2 + 30x + 20

Answer 1

Profit = Revenue - Cost

Answer 2

is it x^2+70x+80

Answer 3

nope try again

Answer 4

i add the 50x+ 20x right?

Answer 5

you are subtracting cost so its -(50x + 20x)

Answer 6

-(50x+20x)= -70x?

Answer 7

sorry my mistake
x^2 + 20x + 50 - (50x + 30)
you get
x^2 + 20x + 50 - 50x - 30
simplify that and your done

Answer 8

x^2-30x+20

Answer 9

correct

Answer 10

thankyou

Answer 11

your welcom