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stira [4]
3 years ago
9

You have 2 positive numbers. One number is one-fifth of the other number. The difference between the two numbers is 228, find th

e numbers.
Mathematics
1 answer:
liberstina [14]3 years ago
7 0

Hey there! I'm happy to help!

Let's call these numbers x and y and model the information we have.

x=1/5y

y-x=228 (we see that x is smaller than y in the first equation, so we put it second )

We see that x is equal to 1/5y. We can switch the x in the second equation with 1/5y and solve for y.

y-1/5y=228

4/5y=228

We divide both sides by 4/5.

y=285

We know that x is 1/5 of y, so we divide by 5.

285/5=57

x=57

So, our numbers are 57 and 285.

Have a wonderful day! :D

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A test is used to assess readiness for college. In a recent​ year, the mean test score was 20.3 and the standard deviation was 4
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Answer:

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Step-by-step explanation:

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For this case we can consider a value to be significantly low if we have that the z  score is lower or equal to - 2 and we can consider a value to be significantly high if its z score is  higher tor equal to 2.

For this case we have the mean and the deviation given:

\mu = 20.3

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And we can find the limits in order to consider values as significantly low and high like this:

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The sum of 1/9 2/3 and 5/18
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