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2 years ago

If Y varies directly with X solve the following :

Mathematics

1 answer:

BARSIC [14]2 years ago

5 0

Answer:

a) x = -270

b) y = 304/9 or y = 33.78

c) x = -37.8

Step-by-step explanation:

y varies directly with x so y = kx

y = kx

k = y/x

k = 10/-30 = -1/3

y = -1/3 x

If y = 90 then

90 = -1/3 x

x = 90 *(-3) = -270

k = y/x

k = -19/-4.5

k = 38/9

y = 38/9 x

If x = - 8 then

y = 38/9 *(-8)

y = 304/9 or y = 33.78

k = y/x

k = -4.3 / 12.9

k = - 1/3

y = -1/3 x

If y = 12.6 then

12.6 = -1/3 x

x = 12.6 *(-3)

x = -37.8

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2 years ago

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$\huge\boxed{width=12cm}$

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3 years ago

A report states that the mean yearly salary offer for students graduating with a degree in accounting is $48,734. Suppose that a

DENIUS [597]

Solution :

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i.e. μ > 48,734

Therefore the null and the alternative hypothesis are

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s = 3600

We take , α = 0.05

The test statistics t is given by

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