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WINSTONCH [101]
3 years ago
13

Choose the best definition for the following term: exponent (1 point)

Mathematics
1 answer:
alex41 [277]3 years ago
4 0
Exponent : <span>Shorthand that tells how many times the base is used as a factor, or how many times the base is multiplied by itself

2x - 2y + 5z -2x - y + 3z....combine like terms
2x - 2x = 0
-2y - y = -3y
5z + 3z = 8z
put it all together and u get : -3y + 8z

3x - y - 3z......x = -2, y = 1, z = -2
sub
3(-2) - 1 - 3(-2)
-6 - 1 + 6
-1 <===


</span>
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20%of what number is 80?
prisoha [69]

20%  times n = 80

.20 n = 80

divide both sides by .2

n = 80/.2

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Answer: 400

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50 POINTS. For what value of the variable is the value of the expression is -3(2x+1) is 20 greater than the expression 8x+5? Ple
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Step-by-step explanation:

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Then, you need to find the difference:

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3 years ago
The mean of the scores obtained by a class of students on a physics test is 42. The standard deviation is 8%. Students have to s
NemiM [27]
<span><u><em>The correct answer is:</em></u>
16%.

<u><em>Explanation</em></u><span><u><em>: </em></u>
We use a z-score to answer this question.
<u>The formula for a z-score is:</u>
 z=</span></span>\frac{x-mue}{sigma}<span><span>,
where mue is the mean and sigma is the standard deviation.

<u>Using our information, we have:</u>
z=</span></span>\frac{50-42}{8} =  \frac{8}{8} = 1<span><span>.

Using a z-table, we see that the area to the left of, or less than, this score is 0.8413. We want to know how many students scored more than this, so we subtract from 1:
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Answer:

D

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I graphed each equation on a piece of paper and on desmos.com

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