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4 years ago

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

Mathematics

2 answers:

Nesterboy [21]4 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

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

kap26 [50]4 years ago

3 0

Answer:

the answer is A

Step-by-step explanation:i just did it

your welcome

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Mrs.Manning is making cookies for the bake sale. She jas 3/4 cup of flour and needs 1/3 cup of flour for her chocolate chip cook

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Answer:

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Step-by-step explanation:

Fraction of Portion

Suppose we have a number n and another number m such as m>n. The portion or fraction of size n of m is given by the quotient n/m.

For example, 3 pieces of cake out of a total of 6 make them a fraction of 3/6 = 1/2 of the whole cake, i.e. half of the total available.

Mrs. Manning needs 1/3 cup of flour to make cookies for the bake sale. She actually has 3/4 cups of flour. Calculate the fraction of needed against the available flour:

$\displaystyle \frac{\frac{1}{3}}{\frac{3}{4}}$