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Maslowich
3 years ago
9

If x varies directly as y, find x when y=8. x=11 when y=-3

Mathematics
1 answer:
andriy [413]3 years ago
8 0

Answer:

x=-\frac{88}{3}

Step-by-step explanation:

When a quantity "A" varies DIRECTLY with another quantity "B", we can write the proportionality equation as:

A = kB

Where k is the proportionality constant (to be found)

In this problem, it is given x varies DIRECTLY with y, so we can write:

x = ky

Also, given, x = 11, y = -3, so we plug these into the equation and first find k:

x = ky

11 = k(-3)

k = -11/3

Now, we need to find x when y = 8, so we substitute and find x:

x=ky\\x=(-\frac{11}{3})(8)\\x=-\frac{88}{3}

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Answer:

C

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3 years ago
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8_murik_8 [283]

Answer:

2\frac{2}{3}

Step-by-step explanation:

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2) Simplify 4 * 3 to 12.

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3) Simplify 12 + 1 to 13.

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4) Convert 1\frac{2}{3}   to improper fraction. Use this rule: a\frac{b}{c} =\frac{ac+b}{c}.

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5) Simplify 1 * 3 to 3.

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6) Simplify 3 + 2 to 5.

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7) Join the denominators.

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8) Simplify.

\frac{8}{3}

9) Convert to mixed fraction.

2\frac{2}{3}

(Decimal Form: 2.666667)

Thank you,
Eddie

3 0
2 years ago
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