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2 years ago

Original amount 120 and new amount is 30. what is the amount of decrease and percent of decrease

2 answers:

5 0

To find how much it was decreased by, subtract the original amount by the new amount:

120 - 30 = 90
So 120 was decreased by 90

First we find what percent 30 is of 120. We do this by dividing the new amount by the original amount, and then multiply by 100 to change the answer from a decimal to a percentage.

30 / 120 x 100 = 25%

This tells us that 30 is 25% of 120. Now we subtract 100% by 25%, to get the percentage decrease:

100 - 25 = 75%
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Answer:
So the amount of decrease was 90
And the percentage decrease was 75%

blagie [28]2 years ago

4 0

0.04 i think im right hope this helps

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The factor of the polynomial, the area of the pool and the simplified expression are all algebraic expressions

<h3>How to simplify the expressions?</h3>

Factor of the polynomial

The polynomial is given as:

2x^3 + 6x^2 + 6x + 18

Factor out 2

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The length of the pool

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Factorize the numerator

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Read more about algebraic expressions at:

brainly.com/question/2164351

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1 year ago

Mr. Harrow has eight boys and six girls in his Honors Pre-calculus class. If he randomly chooses two students, one at a time, wh

Sergeu [11.5K]

Answer: 15/91 which is choice B

=================================================================

There are two methods to find this answer.

Method 1) We have 6 girls and 8+6 = 14 students. The probability of picking a girl is 6/14 = 3/7. After the first girl is chosen, we have 5 girls left out of 14-1 = 13 students overall. The probability of picking another girl (assuming the first selection was a girl) is 5/13. Multiply these probabilities: (3/7)*(5/13) = (3*5)/(7*13) = 15/91

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Method 2) We can use the nCr combination formula. Order does not matter.

We have nCr = 6 C 2 = 15 ways to pick 2 girls. See the attached image below for the steps (figure 1)

Out of nCr = 14 C 2 = 91 ways to pick 2 students. See the attached image below for the steps (figure 2)

So that's another way to get the answer 15/91.

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