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2 years ago

Y varies directly with X. Y=10 when X=5, find y when X=14

Mathematics

1 answer:

Nataliya [291]2 years ago

5 0

Answer:

Step-by-step explanation:

y=kx

10=5k

k=2

y=2×14

y=28

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If y varies inversely as x and y = 27 when x = 12 , find x when y = - 9 .

Sergio039 [100]

Answer:

x = - 36

Step-by-step explanation:

Given that y varies inversely as x then the equation relating them is

y = $\frac{k}{x}$ ← k is the constant of variation

To find k use the condition y = 27 when x = 12, then

k = yx = 27 × 12 = 324, thus

y = $\frac{324}{x}$ ← is the equation of variation

When y = - 9, then

- 9 = $\frac{324}{x}$ ( multiply both sides by x )

- 9x = 324 ( divide both sides by - 9 )

x = - 36

3 0

3 years ago

A picture shows the net of the lateral surface of the cone. Which statement about this cone is NOT true?

Archy [21]

Answer:

The area of the net is not π • 9^2

:P no explanation for u

7 0

3 years ago

Read 2 more answers

If the data is spread out evenly, the measure of the center that is best to use is the what.

miss Akunina [59]

That would be the mean.

3 0

4 years ago

Read 2 more answers

Which of the two solids below are similar ?

Pachacha [2.7K]

Answer: I and II.

Step-by-step explanation:

By definition, two solids are similar if their corresponding sides are in the same ratio.

Knowing this, let's find which solids are similar:

Corresponding sides ratio of solids I and II:

$\frac{3}{2}=\frac{2}{\frac{4}{3}}=\frac{5}{\frac{10}{3}}$

$\frac{3}{2}=\frac{3}{2}=\frac{3}{2}$

Corresponding sides ratio of solids I and III:

$\frac{3}{\frac{9}{2}}=\frac{2}{3}=\frac{5}{8}$

$\frac{2}{3}=\frac{2}{3}=\frac{5}{8}$

Corresponding sides ratio of solids II and III:

$\frac{2}{\frac{9}{2}}=\frac{\frac{4}{3}}{3}}=\frac{\frac{10}{3}}{8}}$

$\frac{4}{9}=\frac{4}{9}=\frac{5}{12}$

You can observe that the solids I and II are similar.

3 0

3 years ago

((HELP, ASAP! PLEASE EXPLAIN CLEARLY!))

FinnZ [79.3K]

A. 8/$12=21/$x then cross multiply.
B. 1/$1.5

3 0

3 years ago