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3 years ago

Step by Step If 35% of a number is 40, what is the number?

Mathematics

1 answer:

zheka24 [161]3 years ago

4 0

.35x=40
/.35 /.35
X= 40/.35
X = 114.2857

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Answer:

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Step-by-step explanation:

(a) Proof: Product of two rational numbers

Using direct proofs.

Let the two rational numbers be A and B.

Such that:

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$B = \frac{2}{3}$

The product:

$A * B = \frac{1}{2} * \frac{2}{3}$

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(b) Proof: Quotient of a rational number and a non-zero rational number

Using direct proofs.

Let the two rational numbers be A and B.

Such that:

$A = \frac{1}{2}$

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$A / B = \frac{1}{2} / \frac{2}{3}$

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$A / B = \frac{1*3}{2*2}$

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(c) x + y is rational (missing from the question)

Using direct proofs.

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The sum:

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$x + y = \frac{7}{6}$

Proved, because 7/6 is rational

<em>The above proof works for all values of A, B, x and y; as long as they are rational values</em>

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