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Pavel [41]
2 years ago
13

If y varies directly with x, and y = 2 when x = −4, what is the value of y when x = 20 ?

Mathematics
2 answers:
balu736 [363]2 years ago
8 0

Answer:

y=kx

2=k.-4

k=-1/2

then

y=-1/2×20

y=-10

ASHA 777 [7]2 years ago
6 0

Answer:

y = - 10

Step-by-step explanation:

Given that y varies directly with x then the equation relating them is

y = kx ← k is the constant of variation

To find k use the condition y = 2 when x = - 4, that is

2 = - 4k ( divide both sides by - 4 )

\frac{2}{-4} = k, that is

k = - \frac{1}{2}

y = - \frac{1}{2} x ← equation of variation

When x = 20, then

y = - \frac{1}{2} × 20 = - 10

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The right answer is "0.70".

Step-by-step explanation:

The given query seems to be incomplete. Please find below the attachment of the full query.

By using the Bayes' theorem, we get

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By putting the values, we get

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                                     =\frac{(0.20+0.15)}{1-0.20-0.30}

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7 0
3 years ago
London mixes 6 parts yellow paint with 3 parts blue paint to make green. She adds 1 more part of yelow to change the
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Answer:

The new ratio is \frac{7}{3} ⇒ (D)

Step-by-step explanation:

<em>The given information is</em>

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<em>Let us find the correct answer</em>

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The new ratio is  \frac{7}{3}

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3 years ago
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34kurt

Answer:

347.55

Step-by-step explanation:

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5 0
2 years ago
Read 2 more answers
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