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DanielleElmas [232]
3 years ago
11

Need some help with this :)

Mathematics
2 answers:
Masteriza [31]3 years ago
4 0
<h3>Answer:  8</h3>

===========================================================

Explanation:

All direct variation equations are of the form y = kx, for some constant k.

We know that y = -8 and x = 4 pair up together. Let's use these two values to find k

y = kx

-8 = k*4

-8/4 = k

-2 = k

k = -2

Therefore, we go from y = kx to y = -2x

We can then find y when x = -4

y = -2x

y = -2*(-4)

y = 8

slega [8]3 years ago
3 0

Answer:

y∝x

y=kx

k=y/x

by putting values

k=-8/4

k= -2

now ,if x= -4

as, y=kx

hence, y= (-2)(-4)

y=8

Step-by-step explanation:

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(1) A part to whole ratio compares different parts of the group to each others is true.

(2)  the ratio 3:1 can also be written as 1 to 3 is false.

(3) A part to whole ratio can be written as a fraction, a decimal, and a percent is true.

(4) two term and three term ratios compare quantities measures in different units is false.

(1) A ratio has two parts, a numerator and a denominator.

Example: if we have 2 oranges and 3 apples in a fruit basket.

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This ratio compares a part of each fruit to the whole

Thus<em>, a part to whole ratio compares different parts of the group to each others is</em> true.

(2) The ratio 3:1 is written as \frac{3}{1} =3.

Thus, <em>the ratio 3:1 can also be written as 1 to 3 is</em> false.

(3) the ratio 2:3, has the following fractions, decimal and percentage with respect to whole ratio;

  • <em>fraction</em> of 2 = \frac{2}{5}, <em>decimal</em> = 0.4, <em>percentage</em> = 40%
  • <em>fraction</em> of 3 = \frac{3}{5}, <em>decimal</em> = 0.6, <em>percentage</em> = 60%

Thus,  <em>a part to whole ratio can be written as a fraction, a decimal, and a percent is</em> true.

(4) the units of the quantities compared have to be the same in order to find their ratios.

Thus, <em>two term and three term ratios compare quantities measures in different units is</em> false.

Learn more here:brainly.com/question/2284943

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