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Y_Kistochka [10]

3 years ago

6

Descriptive Measures Instructions: Use the following data set to find the sample statistics for the following data set. (Round a

nswers to the nearest hundredth, if necessary.
{51,48,42,43,48,48,46,15,29,45,47,55,46,35,47,48,54,26,53,42}

Find n

1 answer:

iren2701 [21]3 years ago

8 0

Answer:

(1) N or n = 20

(2) = 43.4

(3) σ = 9.78 and s = 10.04.

Step-by-step explanation:

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What is the x-intercept of the equation y = 2/3x + 12? Please explain each step for better understanding, thank you:)

VARVARA [1.3K]

Answer:

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Step-by-step explanation:

The x intercept has a y value of 0. So, to find the x intercept, plug in 0 as y into the equation, and solve for x:

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3 years ago

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3 years ago

Doreen Schmidt is a chemist. She needs to prepare 32 ounces of a 13% hydrochloric acid solution. Find the amount of 16% soluti

klasskru [66]

Answer:

She should mix <u>20 ounces</u> of 16% solution and <u>12 ounces</u> of 8% solution.

Step-by-step explanation:

Given:

Doreen Schmidt needs to prepare 32 ounces of a 13% hydrochloric acid solution.

Now, to find the amount she should mix of 16% solution and of 8% solution.

Let the 16% solution amount be $x.$

And let the 8% solution amount be $y.$

<em>So, the total ounces of solution:</em>

$x+y=32$

$y=32-x$ .......(1)

Now, to solve the equation to get the solution she should mix:

$16\%\ of\ (x)+8\%\ of\ (y)=13\%\ of\ (32)\\\\\frac{16}{100}\times x+\frac{8}{100}\times y=\frac{13}{100}\times 32$

$0.16x+0.08y=0.13\times 32$

Substituting the value of $y$ from equation (1) we get:

$0.16x+0.08(32-x)=4.16$

$0.16x+2.56-0.08x=4.16$

$2.56+0.08x=4.16$

Subtracting both sides by 2.56 we get:

$0.08x=1.6$

Dividing both sides by 0.08 we get:

$x=20.$

<em>The 16% solution amount = 20 ounces.</em>

Now, substituting the value of $x$ in equation (1) we get:

$y=32-x\\\\y=32-20\\\\y=12.$

<em>The 8% solution amount = 12 ounces.</em>

Therefore, she should mix 20 ounces of 16% solution and 12 ounces of 8% solution.

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4 years ago

A car travels 0.75 miles per minute. Explain how you could use proportional reasoning to find how far the car travels in one hou

Zina [86]

Notice the proportions below. Keep in mind that 1 hour is 60 minutes.

$\bf \begin{array}{ccll}
miles&minutes\\
\text{\textemdash\textemdash\textemdash}&\text{\textemdash\textemdash\textemdash}\\
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