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Delvig [45]
3 years ago
5

On the first math exam, 16 students received an A grade. On the second math exam, 12 students received an A grade. What percenta

ge decrease is that?
Mathematics
2 answers:
inn [45]3 years ago
8 0

Answer:

25%

Step-by-step explanation:

So, first, you need to subtract 16 by 12, 16-12, which should be 4. after that step, you need to divide 4 by the actual number of students. that should be 16 students. so now, you should get .25, but then to get the percentage, you need to move the decimal point two spaces to the right, or multiply it by 100. then you get 25%.

PSST!! put this in your notes for math, if you want for tests!

Tems11 [23]3 years ago
5 0

The percentage decrease is I think is 4 didn't get A's. I don't know if it's right.

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3 years ago
The length of one leg of a 45° − 45° − 90° triangle is 24. What is the perimeter of the triangle?
prohojiy [21]
<u><em>Answer:</em></u>
second leg = 24 units
hypotenuse = 24√2 units
perimeter = 48 + 24√2 units

<u><em>Explanation:</em></u>
<u><em>1- getting the other leg:</em></u>
Since the triangle given is an isosceles triangle, this means that the two legs are equal in lengths.
We are given that one of the legs is 24 units, therefore, the other leg is also 24 units

<u><em>2- getting the hypotenuse:</em></u>
The given triangle is a right-angled triangle. We can use Pythagorean theorem to get the hypotenuse as follows:
(hypotenuse)² = (24)² + (24)²
(hypotenuse)² = 1152
hypotenuse = 24√2 units

<u><em>3- getting the perimeter:</em></u>
The perimeter of the triangle is the summation of its three sides.
In the given triangle, we have:
two legs = 24 units
hypotenuse = 24√2 units
Therefore:
perimeter = 24 + 24 + 24√2
perimeter = 48 + 24√2 units

Hope this helps :)
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3 years ago
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