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3 years ago

PLS HELP ME WITH THIS QUESTION

Mathematics

2 answers:

icang [17]3 years ago

7 0

Answer:

z = 68º

Step-by-step explanation:

40º + 57º = 97º

180º - 97º = 83º

83º + 29º + z = 180º

112º + z = 180º

z = 180º - 112º

z = 68º

serious [3.7K]3 years ago

4 0

68 have an wonderful day

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Answer:

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Step-by-step explanation:

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Mr.willer wanted to donate 27cans of food to each of 8 food banks.Each of the 23 students in Mr.willers class donated 9 cans . H

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Please help me out with these no one is helping me.<br>Please anyone <br>

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Answer:

Below.

Step-by-step explanation:

You find the values of y by substituting the values of x in the expression x^2 + 3x - 1.

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3 years ago

Read 2 more answers

A copy machine makes 36 copies per minute. How many copies does it make in four minutes and 45 seconds?

blsea [12.9K]

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Step-by-step explanation:

Let's dissect the question. The copy machine makes 36 copies per minute.

36 per min.

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3 years ago

A standardized exam's scores are normally distributed. In a recent year, the mean test score was 14901490 and the standard dev

kicyunya [14]

<h2>Answer with explanation:</h2>

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Mean test score : $\mu=1490$

Standard deviation : $\sigma=320$

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z-score : $z=\dfrac{x-\mu}{\sigma}$

We know that generally , z-scores lower than -1.96 or higher than 1.96 are considered unusual .

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Since it lies between -1.96 and 1.96 , thus it is not unusual.

For x= 1240

$z=\dfrac{1240-1490}{320}\approx-0.78$

Since it lies between -1.96 and 1.96 , thus it is not unusual.

For x= 2190

$z=\dfrac{2190-1490}{320}\approx2.19$

Since it is greater than 1.96 , thus it is unusual.

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Since it lies between -1.96 and 1.96 , thus it is not unusual.

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3 years ago