Question

Help pretty please !!!
the selling price of a stereo is $30 less than 3 times the cost. What percent of the selling price is that profit?

Answer 1

let cost be c

Answer 2

okay do 3*c-30

Answer 3

so

Answer 4

so profit would be

(3c-30)-c

Answer 5

Profit /selling price * 100

Answer 6

okay :)

Answer 7

so if the selling price is 390
it would be

Answer 8

3*c-30=390
find c from this

Answer 9

140

Answer 10

pretty please? lol...well you're on track

Answer 11

c=120

Answer 12

if you plug 120 in for c it would be 330 not 390...

Answer 13

i though c= 140

Answer 14

(140*3)-30=390
420-30=390
390=390