3 years ago

Which of the following is the lowest common denominator for the fractions 5/6 and 3/4? A)4 B)12 C)15 D)24

Mathematics

1 answer:

Ksju [112]3 years ago

8 0

It would be 12 the answer

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-y varies inversely with x. When y = 9.6, x = 12. What is the value of k, the constant of inverse variation?

alisha [4.7K]

Question 1:

For this case we have an equation of the form:

$y = \frac {k} {x}$

Where,

<em>k: inverse variation constant. </em>

Then, substituting values we have:

$y =\frac {k} {x}$

From here, we clear the value of k.

We have then:

$k = 9.6 * 12\\k = 115.2$

Answer:

the constant of inverse variation is:

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Question 2:

For this case we have:

$y = \frac {k} {x}$

Where,

<em>k: constant of variation. </em>

Then, substituting the value of the constant we have:

$y =\frac {5.6} {x}$

We now substitute the value of x:

$y = \frac {5.6} {4}\\y = 1.4$

Answer:

the value of y when x = 4 is: $y = 1.4$

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Mary has saved $17.50 in the past 3 weeks. At this rate, how much will she save in 15 weeks ?

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