3 years ago

What percent of 500 is 255?

Mathematics

2 answers:

Sidana [21]3 years ago

5 0

255 is what percent of 500? = 51.

Elena-2011 [213]3 years ago

3 0

Answer:

Step-by-step explanation:

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3 years ago

Please solve with explanation (high points)

IgorLugansk [536]

So, we know that:

$A=\dfrac{1}{2}ab\\P=a+b+c\\a^2+b^2=c^2$

We also know that $(a+b)^2=a^2+2ab+b^2$ . We will use that fact to find $c$ in terms of $A$ and $P$ .

$A=\dfrac{1}{2}ab\Rightarrow 2ab=4A\\P=a+b+c\Rightarrow a+b=P-c$

Therefore:

$(P-c)^2=c^2+4A\\P^2-2cP+c^2=c^2+4a\\2cP=P^2-4A\\c=\dfrac{P^2-4A}{2P}$

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2 years ago

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3 years ago

Evaluate 5y + 4x when y=10 and x= -5

salantis [7]

5y+4x

5(10) + 4(-5)

50 - 20

30

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3 years ago

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Find the slope of the line through the points (1,-2) and (-7,4)

horrorfan [7]

Answer:

-3/4

Step-by-step explanation:

To find the slope, plug the coordinates into the slope formula.

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4 - (-2) / -7 - 1

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3 years ago