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3 years ago

Why are 1 4 9 16 and 25 called perfect squares

Mathematics

2 answers:

Leokris [45]3 years ago

5 0

Because they are squares of integer numbers.

$1=1^2\\
4=2^2\\
9=3^2\\
16=4^2\\
25=5^2$

olga nikolaevna [1]3 years ago

4 0

Perfect squares can be divided and multiplied by the same number to get the same number. For example 25/5=5. 5*5=25.
4/2=2, 2*2=4
1/1=1, 1*1=1
9/3=3, 3*3=9
16/4=4, 4*4=16.
Hence the perfect squares.

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Help me please ;-; the question is in the photo

expeople1 [14]

You can solve that by dividing 8 on both sides so you can isolate the variable y and know its value. So if you divide 8 on both sides, you'll get 4. 32 divided by 8 is 4. The answer is y = 4. Pick the first choice. I hope you find this answer the most helpful! :)

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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:

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

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

$Z = 1.14$

$Z = 1.14$ has a p-value of 0.8729.

X = 350:

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

$Z = \frac{350 - 425}{110}$

$Z = -0.68$

$Z = -0.68$ has a p-value of 0.2483.

0.8729 - 0.2483 = 0.6246

62.46% of students would be expected to score between 350 and 550.

More can be learned about the normal distribution at brainly.com/question/24663213

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2 years ago

Can someone plz help me!!!

dybincka [34]

Answer:

Step-by-step explanation:

first subtract the 78 to 82

then you will get 4 then subtract 78 by 4

and u get 74

7 0

3 years ago

Read 2 more answers

When multiplying more than two integers how can you determine the sign of the product

ycow [4]

When you multiply two numbers, let’s say x and y, there are no negatives, so you know that it is positive. So that means it’s xy. Now, imagine we make that a -x times y. Since there is only 1 negative, it is negative. So that would be -xy. Now, imagine you have -x times -y. Since there are an even number of negatives, they cancel out!! (Magic). So -x times -y is xy.

6 0

3 years ago

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vovangra [49]

Answer:

A. 85%

135%

B.15%

C.24 gallons

Step-by-step explanation:

B.80-12=68.00 80X15%=12.00

C.6x4=24

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3 years ago