2. You simplified parenthesis on both sides
3. Subtracted 14 from -25 on right side
6. Divided each side by 9
Answer:
The answer is square root 72 or if you don't want to put it under the square root, just simplify and you get 8.49. Just use the distance formula.
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<span>42x - 7y = 7(6x - y)
</span>
<span>I hope this helps</span>
The answer would be the first phrase.
3x is 3 times x, and +4 is the sum of 3x and 4.
The mean of this test will be 57.
<h3>What is Standard Deviation and Mean?</h3>
A standard deviation (or σ) is a measure of how dispersed the data is in relation to the mean.
The mean can be used to get an overall idea, or picture, of the data set.
Let Mean be 'm'
and standard deviation= 
So, m-2
=49
and, m +
=61
Solving the above two equation we get

Now, m= 61-
= 61-4
= 57
So , the mean of this test will be =57
Learn more about mean and standard deviation here:
brainly.com/question/16030790
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