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nasty-shy [4]
3 years ago
8

40 is 20% of x. If x is 80% of y, then what is the sum of x and y?

Mathematics
1 answer:
Tanzania [10]3 years ago
5 0

40 is 20% of x

40 = .2 * x

40/.2 = x

x =200


x is 80% of y

x = .8 * y

200 = .8 *y

200/.8 = y

250 =y


x+y

200+250

450


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faltersainse [42]

\frac{10-(3 \cdot 2^2 - 23)}{(1 + 10^2)-2^2 \cdot 5^2} =

10-\left(3\cdot \:2^2-23\right) =10-\left(-11\right) =21

\left(1+10^2\right)-2^2\cdot \:5^2 =  101-2^2\cdot \:5^2 = 101-4\cdot \:5^2 =101-4\cdot \:25 =101-100 = 1

=\frac{21}{1}

\frac{a}{1}= a

=21

I hope I helped you!

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