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3 years ago

-8^2 and -7^2 (clarity please!?!?)

Mathematics

2 answers:

DENIUS [597]3 years ago

7 0

As we can find that

-8² is -8 x -8 and -7² is -7 x -7

It has the same meaning with rules of positive and negative numbers operation in math :

If a negative value timed/divided by a negative value, the result is a positive value.

if a positive value timed/divided by a negative value or vice versa, the result is a negative value.

defon3 years ago

4 0

Answer:i dont know

Step-by-step explanation:

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Solve: m/9=2/3<br><br> This is for 6th grade math

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Answer:

m=6

Step-by-step explanation:

2/3 = 6/9

9 divided by 3 = 3

3 + 3 = 6

therefore your answer is 6

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3 years ago

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user100 [1]

Answer:

A triangle has side lengths of 13, 5, 10 and angle measures of 30 degrees, 100 degrees, and 50 degrees.

Step-by-step explanation:

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What is the factored form of x2 − 4x − 5?

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Answer:

$\large\boxed{x^2-4x-5=(x+1)(x-5)}$

Step-by-step explanation:

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3 years ago

One year, many college-bound high school seniors in the U.S. took the Scholastic Aptitude Test (SAT). For the verbal portion of

Butoxors [25]

Using the normal distribution, it is found that 62.46% of students would be expected to score between 350 and 550.

<h3>Normal Probability Distribution</h3>

In a normal distribution with mean $\mu$ and standard deviation $\sigma$ , the z-score of a measure X is given by:

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

It 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, which is the percentile of X.

In this problem, the mean and the standard deviation are respectively, given by: $\mu = 425, \sigma = 110$

The proportion of students that would be expected to score between 350 and 550 is the <u>p-value of Z when X = 550 subtracted by the p-value of Z when X = 350</u>, hence:

X = 550:

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

$Z = \frac{550 - 425}{110}$