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3 years ago

Does anybody know how to do this

Mathematics

1 answer:

Nitella [24]3 years ago

7 0

Answer: B

Reason: Plugged it in in my Desmos app, it's free on the appstore and helps you solve for graphs !

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Help plz you Smart people

Nitella [24]

Answer:

y < -1.2

Step-by-step explanation:

Hii,

4/3 < -8/3 y

To get y by itself, you need to divide by -8/3 on both sides...

4/3 divided by -8/3 is the same thing as...

4/3 x -3/8

(when dividing fractions, simply flip the second fraction and multiply straight across)

After that, you get -12/24 which is the same thing as -1/2.

Since you divided by a negative, the inequality sign flips.

So...

-1/2 < y

is...

y < -1/2

Hope this helps!

7 0

3 years ago

Read 2 more answers

Dennis has 14 skittles. If Dennis gave equal numbers of skittles to his 8 friends and then ate what was left, how many skittles

lara [203]

Answer:

1.75

Step-by-step explanation:

Just divide 14 by 8 and you get your answer !!!!

4 0

3 years ago

a bag contains equal amounts of 10 different colored marbles. What is the chance of someone pulling out a blue marble putting it

worty [1.4K]

Answer: 1/20?

Step-by-step explanation: if they’re all different colors and it’s 10 then pulling out blue has a 1/10 chance so pulling it again would be 1/20

3 0

3 years ago

List two numbers that are between the two given numbers:<br> 2 3/5 and 2 7/10

Arisa [49]

Answer:

There are many choices, but one answer is 2 3.1/5 and 2 3.2/5.

Step-by-step explanation:

These are equivalent to 2 6.2/10 and 2 6.4/10 which is between both.

(pls mark as brainliest!)

3 0

3 years ago

Calculate the sample variance and sample standard deviation for the following frequency distribution of heights in centimeters f

Zolol [24]

Answer:

$\bar X = \frac{\sum_{i=1}^n X_i f_i}{n}= \frac{22026.1}{171}=128.81$

$s^2 = \frac{2839948.85- \frac{(22026.1)^2}{171}}{171-1}= 16.59$

$s= \sqrt{16.587}=4.07$

Step-by-step explanation:

For this case we can calculate the sample variance and deviation with the following table

Class Midpoint (Xi) fi Xi*fi Xi^2 *fi

120.6-123.6 122.1 17 2075.7 253443

123.7-126.7 125.2 49 6134.8 768077

126.8-129.8 128.3 29 3720.7 477365.8

129.9-132.9 131.4 41 5387.4 707904.4

133.0-136.0 134.5 35 4007.5 633158.8

___________________________________________

Total 171 22026.1 2839948.85

For this case we can calculate the mean or expected value with the following formula:

$\bar X = \frac{\sum_{i=1}^n X_i f_i}{n}= \frac{22026.1}{171}=128.81$

Now we can calculate the sample variance with the following formula:

$s^2 =\frac{\sum f_i X^2_i -[\frac{(\sum X_i f_i)}{n}]^2}{n-1}$

And if we replace we got:

$s^2 = \frac{2839948.85- \frac{(22026.1)^2}{171}}{171-1}= 16.59$

And the standard deviation would be the square root of the variance and we got:

$s= \sqrt{16.59}=4.07$

7 0

4 years ago