1. Colored copies cost 10¢ per copy and white copies

cost 5¢ per copy. Sandy made 400 copies, some of

which were colored and the rest white. Her total

bill was $22.50, How many colored copies and how

many white cepies did she make?

the answer is A

Step-by-step explanation:i just did it

your welcome

350 white copies and 50 coloured copies

Step-by-step explanation:

$0.10 per coloured copy (c)

$0.05 per white copy (w)

$22.50 total bill

c = number of coloured copies

w = number of white copies

400 = number of total copies

Write a system of equations:

c + w = 400; c = 400 - w

0.1c + 0.05w = 22.5

Replace one variable in the more complex equation:

0.1 (400 - w) + 0.05w = 22.5

Solve:

0.1 (400 - w) + 0.05w = 22.5

40 - 0.1w + 0.05w = 22.5

40 - 0.05w = 22.5

-0.05w = 22.5 - 40

-0.05w = - 17.5

w = - 17.5 : - 0.05

w = 350

c = 400 - w

c = 400 - 116.7

c = 50