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olchik [2.2K]
2 years ago
14

Which equation represents a proportional relationship that has a constant proportionality equal to 0.7

Mathematics
1 answer:
Morgarella [4.7K]2 years ago
8 0

Answer:

first option

Step-by-step explanation:

The equation representing a proportional relationship is

y = kx ← k is the constant of proportion

Here k = 0.7, thus

y = 0.7x ← is the required equation

Given

\frac{y}{x} = \frac{7}{10} ( cross- multiply )

10y = 7x ( divide both sides by 10 )

y = \frac{7}{10} x = 0.7 x ← the required equation

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Answer:

35

Step-by-step explanation:

Here we see 5 black keys for every 7 white keys.

So the ratio is 5:7

If we need 49 white keys, find the amount we scale the original ratio by:

    49/7 = 7

So we are scaling by a factor of 7.

The number of black keys would be 5 * the scale of 7. = 35

So there should be 35 black keys.

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1 year ago
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Answer:

1)  m = negative StartFraction 10 over 4 EndFraction

2) m = negative five-halves

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Step-by-step explanation:

<u>The given equation is:</u>

=> \frac{3}{4} +m = -\frac{7}{4}

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2 years ago
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Kiesha’s quality-control manager told her she must have 97% of her clocks functioning properly. She found a report that said 6 o
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Answer:

Step-by-step explanation:

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When the inventory is 4000 clocks, the prediction is that 3920 clocks will work.

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Answer:

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