3 years ago

What is 25% out of 28

Mathematics

2 answers:

fgiga [73]3 years ago

8 0

Since 25% is 1/4 divide 28 by 4 to get your answer of 9.5

Darina [25.2K]3 years ago

5 0

If you pull out a calculator and type in .25 * 28 you'll get your answer which is 7
so any time you need the percentage of something just turn the percentage into a decimal and multiply it by your number.

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One leg of a right triangle is 7 inches longer than the other leg, and the hypotenuse is 35 inches. Find the lengths of the legs

lilavasa [31]

Answer: 21, 28

Step-by-step explanation:

Side #1 = x
Side #2 = x + 7
Hypotenuse = 35

Use the Pythagorean Theorem $a^{2}+b^{2}=c^{2}$ :

a = x
b = x + 7
c = 35

Substitute in the values & solve:

$x^{2}+(x+7)^{2}=35^{2}\\x^{2}+x^{2}+14x+49=1225\\2x^{2}+14x+49-1225=0\\2x^{2}+14x-1176=0\\2(x^{2}+7x-588)=0\\2(x + 28)(x - 21)=0\\x_{1}=-28, x_{2}=21$

-28 is not a possible solution since you can't have negative inches...

a = x = 21
b = x + 7 = 21 + 7 = 28
c = 35

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