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3 years ago

I need help making the sentence make sense

Mathematics

1 answer:

Bingel [31]3 years ago

4 0

Answer:

first line is mode second line is 21

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Find the population variance of: 4 6 8 9 9 <br><br> round to the nearest hundredth

soldi70 [24.7K]

Answer:

Step-by-step explanation:

To find the population variance, we first need the mean:

$\bar{x}=\frac{4+6+8+9+9}{5}=\frac{36}{5}=7.2$ so the mean is 7.2. To find the population variance (which is almost exactly the same as the sample variance except for a small difference in the denominators of the formula) we have to take each number minus the mean, and then square the difference. Add together all these squared numbers and then divide by the number of numbers. Like this:

$(4-7.2)^2=10.24\\(6-7.2)^2=1.44\\(8-7.2)^2=.64\\(9-7.2)^2=3.24\\(9-7.2)^2=3.24$

Add together those numbers and divide them by 5:

$\sigma=\frac{10.24+1.44+.64+3.24+3.24}{5}=\frac{18.8}{5}=3.76$

5 0

3 years ago

What is the x coordinate of the solution of the system? 2x+y=15 and x-y=3

Varvara68 [4.7K]

x - y = 3

x = 3 + y

x -3 = y

y = x-3

put it in 1st equation

2x +y = 15

2x + x - 3 = 15

3x - 3 = 15

3x = 15+3 = 18

x = 18/3 = 6

x = 6

6 0

4 years ago

12y - 15x + 6 please hurry

ddd [48]

Answer: negative 8 or -8

Step-by-step explanation:

would include explanation but it would take a while hope it helped and may i have brainliest please?!

5 0

3 years ago

Lilia scores 15 points fewer than Bob, who scores 35 points. Carol scores half as many points as Lilia. How many points does Car

nignag [31]

Answer:

10 points the explantion is below

Step-by-step explanation:

Bob scored 35 points and Lilla scores 15 less so you start with 35 - 15. Then you want to divide 20 by 2 because Carol scored half as much as Lilla. Your equation is ( 35-15) / 2 = 10

3 0

3 years ago

If I equals √-1 what is the value of I³

ziro4ka [17]

Answer:

-I

Step-by-step explanation:

Given :

I= $\sqrt{-1}$

Now

$I^{2} =-1$

And $I^{3} =-i$

Answer will be -I

8 0

3 years ago