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loris [4]
3 years ago
6

A school cafeteria makes cheese sauce for macaroni using 15 cups of Swiss cheese and 17 cups of cheddar cheese. Perry tries to m

ake the sauce for your family party using 5 cups of swish cheese and 7 cups of cheddar. Is peery using the correct ratio?
Mathematics
2 answers:
Harrizon [31]3 years ago
8 0

Take Perry's sauce for your family party:

5 cups Swiss and 7 cups cheddar.

Multiply both amounts by 3:

15 cups Swiss and 21 cups cheddar.

The cafeteria recipe is 15 cups Swiss and 17 cups cheddar, so

15 cups Swiss and 21 cups cheddar are an incorrect ratio.

Answer: No

erma4kov [3.2K]3 years ago
4 0

No. Perry is using an incorrect ratio.

You have to cross multiply and when you do that you get 105 and 85 so the ratios are not the same.

Hope this helps!

Have an amazing day :)


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Square root both sides:
5x - 2 = \pm\sqrt{15}

Add 2 to both sides:
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Divide both sides by 5:
x =  \dfrac{ \pm\sqrt{15} + 2}{5}

Answers:
x = \dfrac{ \sqrt{15} + 2}{5} \ or \ \dfrac{ - \sqrt{15} + 2}{5}

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In 2014, 85 percent of households in the United States had a computer. For a randomly selected sample of 200 households in 2014,
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Answer:

The mean of C is 170 households

The standard deviation of C, is approximately 5 households

Step-by-step explanation:

The given parameters are;

The percentage of households in the United States that had a computer in 2014 = 85%

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The random variable representing the number of households that had a computer = C

Therefore, we have;

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Let

Therefore;

The mean (expected) number in the sample, μₓ, = E(x) = n × P is given as follows;

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The mean of C = μₓ = 170

The variance, σ² = n × P × (1 - P) = 200 × 0.85 × (1 - 0.85) = 25.5

Therefore;

The standard deviation, σ = √(σ²) = √(25.5) ≈ 5.05

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