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3 years ago

Mark each of the following as true or false and explain how you know.

Mathematics

2 answers:

earnstyle [38]3 years ago

4 0

True
False
False
True

(I think)

Tamiku [17]3 years ago

3 0

1) True, -5 is left to 3 on a number line, therefore it is less than 3.
2) False, 3 is right to -5 on a number line, therefore it is greater than -5.
3) False, |-5| is equal to 5 and 5 is right to 3 on a number line, therefore |-5| is greater than 3.
4) True, |-5| is equal to 5 and 5 is right to 3 on a number line, therefore |-5| is greater than 3.

let me know if you have any questions :)

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Consider a value to be significantly low if its z score less than or equal to minus−2 or consider a value to be significantly hi

den301095 [7]

Answer:

Test scores of 10.2 or lower are significantly low.

Test scores of 31 or higher are significantly high

Step-by-step explanation:

Z-score:

In a set with mean $\mu$ and standard deviation $\sigma$ , the zscore of a measure X is given by:

$Z = \frac{X - \mu}{\sigma}$

The Z-score measures how many standard deviations the measure is from the mean. After finding the Z-score, we look at the z-score table and find the p-value associated with this z-score. This p-value is the probability that the value of the measure is smaller than X, that is, the percentile of X. Subtracting 1 by the pvalue, we get the probability that the value of the measure is greater than X.

In this problem, we have that:

$\mu = 20.6, \sigma = 5.2$

Significantly low:

Z-scores of -2 or lower

So scores of X when Z = -2 or lower

$Z = \frac{X - \mu}{\sigma}$

$-2 = \frac{X - 20.6}{5.2}$

$X - 20.6 = -2*5.2$

$X = 10.2$

Test scores of 10.2 or lower are significantly low.

Significantly high:

Z-scores of 2 or higher

So scores of X when Z = 2 or higher

$Z = \frac{X - \mu}{\sigma}$

$2 = \frac{X - 20.6}{5.2}$

$X - 20.6 = 2*5.2$

$X = 31$

Test scores of 31 or higher are significantly high

6 0

3 years ago

Transform the equation 3x + y = 5 into slope-intercept form.

marin [14]

Answer: y=-3x+5

Step-by-step explanation:

Slope-intercept form is y=mx+b. So to make your equation into slope-intercept form, simply subtract 3x from both sides, which results in y=-3x+5

3 0

2 years ago

Read 2 more answers

What is the next number of 1 2 6 17 47 ?<br>and how?!

geniusboy [140]

2 , 6 , 17 , 47 , <u>108</u> , ...

t(n) = 2n^3 - 8.5n^2 + 15.5n - 7

3 0

2 years ago

Help!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!

Anit [1.1K]

Well the area of a trapezoid is defined by the following formula:
A = $\frac{1}{2}(b_{1} + b_{2})h$ where b₁ and b₂ are the bases of the trapezoid and h is the height of the trapezoid.

Let's plug in what we know into this formula:
h = 7 the perpendicular distance between the two bases
b₁ = 15 the shorter parallel side
b₂ = 25 the longer parallel side made up of 4 + 15 + 6
so, A = $\frac{1}{2} (15+25)(7)=140$

This is in square units of measure of course, so 140 in²

8 0

2 years ago

Please help me,.........

Nastasia [14]

Answer

19?

Step-by-step explanation:

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2 years ago