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seropon [69]
3 years ago
11

color copies cost 10 cents per copy and white copies cost 5 cents per copy. sandy made 400 copies, some of which were colored an

d the rest were white. her total bill was 22.50. how many colored copies and how many white copies did she make?
Mathematics
1 answer:
muminat3 years ago
7 0
The answer is 80 copies
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<h2>Answer:150 electricians,10 inspectors</h2>

Step-by-step explanation:

The solution uses unitary method.

The unitary method is a method for solving a problem by first finding the value of a single unit and finding the required value by multiplying the single unit value.

Given,

Each generator employs 3 electricians.

Every 60 electricians require 4 inspectors.

So,every electrician require \frac{4}{60}=\frac{1}{15} inspectors.

Anthony's department has 50 generators.

Since each generator requires 3 electricians,50 generators require 3\times 50=150 electricians.

Since each electrician needs \frac{1}{15} inspectors,150 electricians need \frac{1}{15} \times 150=10 inspectors.

So,to maintain peak performance Antony's department requires 150 electricians and 10 inspectors.

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4 years ago
9) Which solution is correct? Be sure to check for extraneous solutions.
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