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mojhsa [17]
3 years ago
5

The time it takes to complete a test is

Mathematics
1 answer:
astra-53 [7]3 years ago
8 0

Answer:

<h2>The z-score is -3.08, approximately.</h2>

Step-by-step explanation:

The z-score is defined

Z=\frac{x - \mu}{\sigma}

Where \mu is the mean, \sigma is the standard deviation and x the data value.

In this case, we have

x=8\\\mu = 45\\\sigma=12

Replacing values, we have

Z=\frac{8-45}{12}=\frac{-37}{12} \approx -3.08

Therefore, the z-score is -3.08, approximately.

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The points A(–5, 5) and B(–5, –7) are plotted on the coordinate plane.
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C I did this before
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Find 93 • 87 using mental math.
bagirrra123 [75]
Okay so start with multiplying 93 * 7

So 3 x 7= 21

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Then 8 x 93
Remember that first is a zero.
8 X 3= 24
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Read 2 more answers
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If you're asking for the model for the second problem (I didn't see any unsolved), here it is!

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3 years ago
Russell has been training for the Emerald Valley Race. The first week he trained, he ran 5 days and took the same two routes eac
Ivahew [28]

In maths, Distance is described as the quantity of space between two points, and further calculation can be defined as follows:

Given Expression:

5x + 2 = 30\\\\2(x + 5) = 30\\\\5(x + 2) = 30\\\\2x + 5 = 30

To find:

distance=?

Solution:

5\ days\ \begin{cases} & \text{ if } \text{before school 2 miles}    \\  & \text{ if } \text{after school x miles} \end{cases}

\therefore 5(x+2)=30\\\\

\bold{5(x+2)=30}\\\\\bold{5x+10=30}\\\\\bold{5x=30-10}\\\\\bold{5x=20}\\\\

\bold{x=\frac{20}{4} }\\\\\bold{x=4}

Therefore, the final answer is "4 miles".

Learn more:

brainly.com/question/12186030

8 0
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Solve for x -3x+6=2x-24
ozzi

Answer:

7.5 or 15/2

Step-by-step explanation:

x-3x+6=2x-24 -- Combine like terms

-2x+6=2x-24 -- Add 2x to each side

6 = 4x-24 -- add 24 to each side

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