All categories

3 years ago

How do you find direct variation? im having trouble understanding this subject

1 answer:

5 0

I was too just a couple of weeks ago. So direct variation is the constant way to variables change together. EX:
x y
1 2
2 4
3 6
Direct variation must be in the format b=ka where k is a constant. So the direct variation here could be y=2x. Understand?

You might be interested in

In one week, a mill worker worked 12,11,13,12,15,16, and 14 hours. Identify the median number of hours worked

velikii [3]

Answer: 13

Step-by-step explanation:

First, we have to arrange the numbers in either ascending or descending order.

12,11,13,12,15,16, and 14 hours will then be: 11, 12, 12, 13, 14, 15 and 16.

The median will be gotten using the formula: = (n + 1) / 2

Since there are 7 numbers this will be:

= (n + 1) / 2

= (7 + 1) / 2

= 8/2

= 4th number

Since 13 is the 4th number, it's the median

8 0

3 years ago

(-3)s-4=29 what does s equal?

Arturiano [62]

(-3)s=33
S=33/(-3)=-11

8 0

3 years ago

The table shows the estimated number of bees, y, in a hive x days after a pesticide is released near the hive.

Oksana_A [137]

Answer:

Step-by-step explanation:

The given table is

Days Bees

0 10,000

10 7,500

20 5,600

30 4,200

40 3,200

50 2,400

Where $x$ represents days and $y$ represents bees.

The exponential function that models this problem must be like

$y=a(1-r)^{x}$ , which represenst an exponential decary, because in this case, the number of bees decays.

We nned to use one points, to find the rate of decay. We know that $a=10,000$ , because it starts with 10,000 bees.

Let's use the points (10, 7500)

$y=a(1-r)^{x}\\7500=10000(1-r)^{10}$

Solving for $r$ , we have

$\frac{7500}{10000}=(1-r)^{10} \\(1-r)^{10} =0.75$

Using logarithms, we have

$ln((1-r)^{10}) =ln(0.75)\\10 \times ln(1-r)=ln(0.75)\\ln(1-r)=\frac{ln(0.75)}{10} \approx -0.03\\e^{ln(1-r)}=e^{-0.03}\\1-r =e^{-0.03}\\r=-e^{-0.03}+1 \approx 1.97$

Replacing all values in the model, we have

$y=10000(1-1.97)^{x}\\y=10000(0.97)^{x}$

Therefore, the right answer is the first choice, that's the best approximation to this situation.

6 0

2 years ago

Read 2 more answers

I need the answer to this

mash [69]

Answer:

$A)\:x$

$5(x+5)$

<u>OAmalOHopeO</u>

3 0

2 years ago

Read 2 more answers

Giving Brainliest!<br> Explain the difference between low and high-frequency waves

Alinara [238K]

Answer:

Frequency refers to the number of waves that pass a given point in a given time period and is often expressed in terms of hertz (Hz), or cycles per second. Longer wavelengths will have lower frequencies, and shorter wavelengths will have higher frequencies

8 0

3 years ago