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PSYCHO15rus [73]
3 years ago
10

All of the following relations are functions, except A) y = x2. B) x = y2. C) y = |x|. D) y = x .

Mathematics
2 answers:
elena-s [515]3 years ago
7 0
B) x = y^2 because it fails the vertical line test making it not a function
yulyashka [42]3 years ago
4 0

The answer is <u>B</u> because.....

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£980 is divided between Caroline, Sarah &amp; Gavyn so that Caroline gets twice as much as Sarah, and Sarah gets three times as
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Sarah has received £ 294

<u><em>Solution:</em></u>

Given that £980 is divided between Caroline, Sarah & Gavyn

Let "c" be the amount received by caroline

Let "s" be the amount received by sarah

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<em><u>Caroline gets twice as much as Sarah</u></em>

amount received by caroline = twice as much as Sarah

amount received by caroline = 2(amount received by sarah)

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amount received by sarah = 3(amount received by gavyn)

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Given that total amount is 980

c + s + g = 980 --- eqn 3

<em><u>Let us solve eqn 1, 2, 3 to get values of "c" "s" "g"</u></em>

From eqn 2,

g = \frac{s}{3}  --- eqn 4

Substitute eqn 1 and eqn 4 in eqn 3

2s + s + \frac{s}{3} = 980\\\\\frac{6s + 3s + s}{3} = 980\\\\6s + 3s + s = 980 \times 3\\\\10s = 2940\\\\s = 294

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