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2 years ago

What number is represented by point B?

Mathematics

2 answers:

enot [183]2 years ago

7 0

It’s either a or b i’m not sure

marysya [2.9K]2 years ago

5 0

Answer:

pretty sure it b

Step-by-step explanation:

You might be interested in

If y=-16 when x=4 find x when y=48

MatroZZZ [7]

Answer:

x= -12

Step-by-step explanation:

Assuming this is a direct variation

y = kx

When y = -16 x =4 we can find k

-16 = k*4

Divide each side by 4

-16/4 = 4k/4

-4 =k

y = -4k

Y = 48

48 = -4x

Divide each side by -4

48/-4 = -4x/-4

-12 =x

8 0

2 years ago

Find the number that makes the ratio equivalent to 8:3.<br> :30 <br> pleas just say the number

Blizzard [7]

Answer:

32 : 12 is the second equivalent ratio. = 48 : 18 is the third equivalent ratio. Therefore, the three equivalent ratios of 8 : 3 are 16 : 6, 32 : 12 and 48 : 18

3 0

2 years ago

Fill in the blank to find the y-intercept of-x+2y=10

Lesechka [4]

I think x is 20 I’m not sure tho since it would come out as -10 instead of positive

6 0

2 years ago

monarch butterflies migrates when they sense daylight hours are shorter and temperature get colder.write two equivalent fraction

Tpy6a [65]

Two equivalent fractions to represent the part of the migration a monarch butterfly can complete in 1 week is $\frac{5}{25}$ or $\frac{1}{5}$ .

<h3>What is a fraction?</h3>

A fraction is a mathematical expression that shows the relationship between parts vs total. In a fraction, the part is written first and it is known as the numerator. On the other hand, the total is written below and it is known as the denominator.

<h3>How to write a fraction?</h3>

Here are the steps to write a fraction:

Find the total.
Find the part.
Write the fraction.

Based on this, in the chart, the part of the migration these butterflies can complete in a week are the squares in green, while the total is the total squares. This means the fraction for this situation is:

$\frac{5}{25}$

Moreover, you can simplify this fraction and find an equivalent one by dividing the denominator by the numerator as:

$\frac{1}{5}$

Note: This question is incomplete because there is a missing image; below I attach the missing section.

Learn more about fractions in: brainly.com/question/1301963

3 0

1 year ago

A survey is to be conducted to determine the average driving in miles by Minnesota State University, Mankato students. The inves

Nadusha1986 [10]

Answer:

$n=(\frac{1.75(8.2)}{1.5})^2 =91.52 \approx 92$

So the answer for this case would be n=92 rounded up to the nearest integer

Step-by-step explanation:

Previous concepts

A confidence interval is "a range of values that’s likely to include a population value with a certain degree of confidence. It is often expressed a % whereby a population means lies between an upper and lower interval".

The margin of error is the range of values below and above the sample statistic in a confidence interval.

Normal distribution, is a "probability distribution that is symmetric about the mean, showing that data near the mean are more frequent in occurrence than data far from the mean".

$\bar X$ represent the sample mean for the sample

$\mu$ population mean (variable of interest)

s represent the sample standard deviation

n represent the sample size

Solution to the problem

The margin of error is given by this formula:

$ME=z_{\alpha/2}\frac{\sigma}{\sqrt{n}}$ (a)

And on this case we have that ME =1.5 and we are interested in order to find the value of n, if we solve n from equation (b) we got:

$n=(\frac{z_{\alpha/2} \sigma}{ME})^2$ (b)

The critical value for 92% of confidence interval now can be founded using the normal distribution. And in excel we can use this formla to find it:"=-NORM.INV(0.04;0;1)", and we got $z_{\alpha/2}=1.75$ , replacing into formula (b) we got:

$n=(\frac{1.75(8.2)}{1.5})^2 =91.52 \approx 92$

So the answer for this case would be n=92 rounded up to the nearest integer

5 0

2 years ago