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3 years ago

What number is 25 percent of 64

Mathematics

1 answer:

olchik [2.2K]3 years ago

8 0

Hi

64 ⇒ 100%
x ⇒ 25%

100x = 64(25)
100x = 1600
x = 1600/100
x = 16

Answer:

16 is 25% of 64

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The answer is $x = \frac{-7+ \sqrt{193} }{4}$ .

There is very similar question on Brainly, in which dimensions of the living room are given (20 feet, 30 feet).
So, knowing this, we first need to calculate how much 6% of the living room is.
The area of the living room is 600 square feet, since it is rectangle-shaped:
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The area of the triangular-based cabinet (A) is $A = \frac{a*h}{2}$ , where a is the base, and h is the height of the triangle.
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Now, let's implement this to the formula $A = \frac{a*h}{2}$ :
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Let's both sides divide by 3:
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This is the quadratic formula ( $a x^{2} +bx+c=0$ ) for which
$x = \frac{-b+\sqrt{b^{2} -4ac} }{2a}$ or
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We will use only $x = \frac{-b+\sqrt{b^{2} -4ac} }{2a}$ , because the length cannot have negative value.

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a = 2
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c = -18

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