3 years ago

What is the constant of variation, k, of the line y = kx through (3,18) and (5,30)?

1 answer:

4 0

Y - 18 = (30 - 18)/(5 - 3) (x - 3)
y - 18 = 12/2 (x - 3)
y - 18 = 6(x - 3) = 6x - 18
y = 6x

The constant of variation (k) is 6.

You might be interested in

inez waters her plants every two days she trim them every 15 days she did both today when will she do both again

lord [1]

She will do both again in 30 days.

She waters every two days and 2 is a even number.

She trims her plants every 15 days and 15 is an odd number.

When you add two odd numbers you get an even 15 + 15 = 30

2 × 15 = 30

8 0

3 years ago

Suppose your class sells gift wrap for $4 per package and greeting cards for $10 per package. Your class sells 205 packages in a

FromTheMoon [43]

Answer:

Step-by-step explanation:

1,084 divided by

3 0

3 years ago

In order to estimate the average electric usage per month, a sample of 81 houses was selected and the electric usage was determi

lana [24]

Answer:

Confidence interval: (1760,1956)

Step-by-step explanation:

We are given the following information in the question:

Sample size, n = 81

Sample mean =

$\bar{x} = 1858 \text{ kWh}$

Population standard deviation =

$\sigma = 450 \text{ kilowatt-hours}$

Confidence Level = 95%

Significance level = 5% = 0.05

Confidence interval:

$\bar{x} \pm z_{critical}\displaystyle\frac{\sigma}{\sqrt{n}}$

Putting the values, we get,

$z_{critical}\text{ at}~\alpha_{0.05} = \pm 1.96$

$1858 \pm 1.96(\displaystyle\frac{450}{\sqrt{81}} ) = 1858 \pm 98 = (1760,1956)$

6 0

3 years ago

Help its iready ill give brainiest

madam [21]

Answer:

7(1/2)

Step-by-step explanation:

7 0

3 years ago

Write 7 over 21 in simplest form<br><br> I have a whole page of this to do, please help

erica [24]

Answer:

1/3 is the answer

Step-by-step explanation:

3 0

3 years ago

Read 2 more answers