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hichkok12 [17]
3 years ago
11

Find the constant of variation k for the direct variation 3x+5y=0

Mathematics
1 answer:
Eva8 [605]3 years ago
3 0

Answer:

-3/5

Step-by-step explanation:

3x+5y=0

Subtract 3x from each side

3x+5y-3x=0-3x

5y = -3x

Divide each side by 5

5y/5 = -3x/5

y = -3/5 x

A direct variation is y = kx

y = -3/5 x

The constant of variation is -3/5

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1. Mark and Bill have a combined weight of 170
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<h3>Equation : x + y = 170 and y = 2x - 40</h3><h3>The weight of Bill is 70 pounds and weight of mark is 100 pounds</h3>

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

Let the weight of Bill be "x"

Let the weight of mark be "y"

Given that,

Mark and Bill have a combined weight of 170  pounds

Therefore,

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<em><u>Substitute eqn 2 in eqn 1</u></em>

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