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3 years ago

Write an equation of the direct variation that includes the point (9, –12).

Mathematics

1 answer:

Olenka [21]3 years ago

3 0

Answer:

I think you have a typo in you choices...

y = -4/3 x is the answer...

which is the same as y = - 1 1/3 x

you don't have that choice, "A" and "C" are the same..

I think that one of them is "y = - 1 1/3 x "

y = kx

-12 = k 9

k = -12/9 = -4/3

Step-by-step explanation:

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Step-by-step explanation:

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3 years ago

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Which of the following must be true about p?

Rainbow [258]

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Answer:

B, C, F, H

Step-by-step explanation:

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3 years ago

With a ruler, Diamond determines the diameter of a golf ball to be 4.2 centimeters (a radius of 2.1 cm) and the diameter of a pr

Troyanec [42]

Answer:

Diamonds is incorrect, because, the volume of the softball is 8 times the volume of the golf ball

Step-by-step explanation:

we know that

The volume of a sphere is equal to

$V=\frac{4}{3}\pi r^{3}$

where

r is the radius

step 1

Find the volume of the golf ball

we have

$r=2.1\ cm\\pi =3.14$

substitute

$V=\frac{4}{3}(3.14)(2.1)^{3}=38.77\ cm^3$

step 2

Find the volume of the the softball

we have

$r=4.2\ cm\\pi =3.14$

substitute

$V=\frac{4}{3}(3.14)(4.2)^{3}=310.18\ cm^3$

step 3

Find the ratio of volumes

Divide the volume of the softball by the volume of the golf ball

$\frac{310.18}{38.77}=8$

That means

Diamonds is incorrect, because, the volume of the softball is 8 times the volume of the golf ball

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Answer:

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Step-by-step explanation:

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3 years ago