All categories

3 years ago

PLEASE HELP! 48 POINTS! show your work

Mathematics

2 answers:

LekaFEV [45]3 years ago

8 0

Answer:

A Constant of variation is 3

Step-by-step explanation:

Remark

Direct variations have an equation that looks like y = kx There is NO y intercept, or the y intercept = 0. If you solve for the slope of choices B C and D you get a y intercept that is not 0. For example Take C

4y = 5x + 3 Divide both sides by 4 (the coefficient of y)
4y/4 = 5x/4 + 3/4 Do the division
y = 1.25 x + 0.75.
0.75 is not zero. This is not a direct variation. The same procedure can be done to B and D with the same results and the same comment.

Solution

Your only possible answer is A

The constant of variation =

4y = 12 x Divide by 4
4y/4 = 12x/4 Do the division
y = 3x The coefficient (3) of x is the constant of variation

kolezko [41]3 years ago

4 0

Answer:

a. 4y =12x the constant of variation is 3

Step-by-step explanation:

The equation for direct variation is y=kx

a. 4y =12x

Divide each side by 4

4y/4 = 12x/4

y = 3x

This is direct variation and the constant is 3

Equations b ,c, d all have a constant added which make them something other than a direct variation

You might be interested in

Solve the problem attached in the image

EleoNora [17]

Answer:

no te entiendo

yo también la busco

4 0

3 years ago

Read 2 more answers

Please solve with explanation

Olin [163]

Answer:

See the files.

Step-by-step explanation

6 0

2 years ago

F(x) = -1/4x + 2 what Is the domain <br>

eimsori [14]

Answer:

I'm not good with this stuff myself... lol

Step-by-step explanation:

All real numbers. X€R

4 0

4 years ago

Assume you have such a watch. if a minimum of 18.0% of the original tritium is needed to read the dial in dark places, for how m

laila [671]

Given that the half life of 3H is 12.3 years.

The amount of substance left of a radioactive substance with half life of $t_{ \frac{1}{2} }$ after t years is given by

$N(t)=N_0\left(\frac{1}{2} \right)^{ \frac{t}{t_{\frac{1}{2}} }$

Therefore, the number of years it will take for 18% of the original tritinum to remain is given by

$18 \% = 100 \% \left(\frac{1}{2} \right)^{ \frac{t}{12.3}} \\ \\ \Rightarrow\left(\frac{1}{2} \right)^{ \frac{t}{12.3}} =0.18 \\ \\ \Rightarrow\frac{t}{12.3}\ln\left(\frac{1}{2} \right)=\ln0.18 \\ \\ \Rightarrow\frac{t}{12.3}= \frac{\ln0.18}{\ln\left(\frac{1}{2} \right)} = \frac{-1.715}{-0.6931} =2.474\\ \\ \Rightarrow t=2.474(12.3)=30.4$

Therefore, the number of <span>years that the time could be read at night is 30.4 years.</span>

5 0

3 years ago

A newspaper reported that in one year the United States imported goods from China worth a total of 385 billion dollars. What is

8_murik_8 [283]

Answer:

I dont known this one is hard

4 0

3 years ago