2 years ago

What is 75 percent of 30?

2 answers:

7 0

So percent means parts out of 100 so 75%=75/100=3/4
3/4 of 30
'of' means multiply
3/4 times 30=90/4=45/2=22.5
22.5 is the answer (or 22 and 1/2)

iVinArrow [24]2 years ago

4 0

30/4 is 7.5 and 7.5 times 3 is 22.5 so 75% of 30 should be 22.5

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Step-by-step explanation:

Side #1 = x
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Substitute in the values & solve:

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

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