3 years ago

If Y varies directly with X, and Y = -5 and X = 7, what is X when Y = -85?

Mathematics

1 answer:

Tasya [4]3 years ago

6 0

Answer:

X = 119

Step-by-step explanation:

Step 1: Given

Y = -5 X = 7

Y = -85 X = n

Step 2:

-85 ÷ -5 = 17

Step 3:

17 × 7 = 119

Answer:

Y = -5 X = 7

Y = -85 X = 119

n = 119

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$x=\frac{7}{5}$

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Step-by-step explanation:

Given:

The given expressions are.

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We need to find x and y values.

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Equation 2⇒ $x-4y=19$

First solve the equation 1 for y.

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Substitute $y = 4-6x$ in equation 2.

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$x=\frac{35}{25}$

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$x=\frac{7}{5}$

Substitute x value in equation 3 and simplify.

$y=4-6(\frac{7}{5})$

$y=4-\frac{6\times 7}{5}$

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$y=\frac{5\times 4-42}{5}$

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$y=-\frac{22}{5}$ .

Therefore, the value of $x=\frac{7}{5}$ and $y=-\frac{22}{5}$ .

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