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Airida [17]
3 years ago
13

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

Mathematics
2 answers:
Nesterboy [21]3 years ago
7 0

Answer:

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

<em>Write a system of equations:</em>

c + w = 400; c = 400 – w

0.1c + 0.05w = 22.5

<em>Replace one variable in the more complex equation:</em>

0.1(400 – w) + 0.05w = 22.5

<em>Solve:</em>

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

<u>w = 350</u>

c = 400 – w

c = 400 – 116.7

<u>c = 50</u>

kap26 [50]3 years ago
3 0

Answer:

the answer is  A

Step-by-step explanation:i just did it

your welcome

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