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4 years ago

Need to show a 5 step problem on how to get the answer. Using x and y

Mathematics

1 answer:

ZanzabumX [31]4 years ago

4 0

Answer: $5.64

<u>Step-by-step explanation:</u>

Let x represent 1 box of batteries

Let y represent 1 case of batteries

Given: 14x = 3y

Given: 158 = 14x + 3y

Use substitution: 158 = 14x + 14x

Simplify: 158 = 28x

Divide by 28: 5.64 = x

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Solve for x. Image is below.

alina1380 [7]

Answer:

(2x +5) + 3x = 90

5x + 5 = 90

5x = 85

x = 17

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Answer:

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Describing part to part realationship

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Answer:

If you mean a part to part ratio, this basically describes a ratio or relationship that compares two different groups.

Step-by-step explanation:

If you mean a part to part ratio, this basically describes a ratio or relationship that compares two different groups.

An example would be if I compared the number of dogs to cats in a house. If there were 10 dogs and 3 cats, I would write 10:3.

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3 years ago

assume the age of night school students is normally distributed. A simple random sample of 24 night school students had an avera

aleksley [76]

Let
n = number of data
s = standard deviation (sample)
S = standard deviation (population)

The working equations is

$\frac{(n-1) s^{2} }{ x^{2}_{right} } \ \textless \ S^{2} \ \textless \ \frac{(n-1) s^{2} }{ x^{2}_{left} }$

To find $x^{2}_{right}$ , : (1 - 0.90)/2 = 0.05

To find $x^{2}_{left}$ , : 1 - 0.05 = 0.95

Degrees of freedom = n-1 = 24 - 1 = 23

This is shown in the figure attached. Since there is no row for df=23, we interpolate. Thus,

$x^{2}_{left} = 13.093$

$x^{2}_{right} = 35.17$

Substitute all values,

$\frac{(24-1) 5.6^{2} }{ 35.17} \ \textless \ S^{2} \ \textless \ \frac{(24-1) 5.6^{2} }{ 13.093} }$

Thus the answer is,

$20.51\ \textless \ S^{2} \ \textless \ 55.09$

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3 years ago

As the value of x increases by 8, the value of y decreases by 4

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What is the question?

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4 years ago

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