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Romashka-Z-Leto [24]
3 years ago
14

If y is directly proportional with x and y = 36 when x = 30, what is the value of y when x = 40?

Mathematics
1 answer:
vivado [14]3 years ago
3 0

Answer:

y = 48

Step-by-step explanation:

given y is directly proportional to x then the equation connecting them is

y = kx ← k is the constant of proportionality

To find k use the condition y = 36 when x = 30

k = \frac{y}{x} = \frac{36}{30} = \frac{6}{5}

y = \frac{6}{5} x ← equation of proportionality

When x = 40 then

y = \frac{6}{5} × 40 = 48


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Dividing two decimals means that we need to make the following math operation:

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Help please!<br><br> A.<br><br><br> B.<br><br><br> C.<br><br><br> D.
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Answer:

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Step-by-step explanation:

you can find the slope to find b or y-intercept (x=0) for equation

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