3 years ago

Helppppp plsss!!!!!!!!!!!

Mathematics

1 answer:

bagirrra123 [75]3 years ago

8 0

Answer:

22 inch is the diameter because d =2r

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The class sizes of elementary school classes in a public school district are normally distributed with an unknown population mea

weqwewe [10]

Answer: $(17.14,\ 22.86)$

Step-by-step explanation:

The confidence interval estimate for the population mean is given by :-

$\overline{x}\pm ME$ , where $\overline{x}$ is the sample mean and ME is the margin of error.

Given : Sample mean: $\overline{x}=20$

The margin of error for a 98% confidence interval estimate for the population mean using the Student's t-distribution : $ME=2.86$

Now, the confidence interval estimate for the population mean will be :-

$20\pm2.86=(20-2.86,\ 20+2.86)=(17.14,\ 22.86)$

Hence, the 98% confidence interval estimate for the population mean using the Student's t-distribution = $(17.14,\ 22.86)$

8 0

3 years ago

How many points of intersection does this system have?<br>y = 3x-42<br>-3x+y=4

zzz [600]

Answer:

This system has no points of intersection.

Step-by-step explanation:

The lines are parallel, so they don't intersect.

I graphed the equations below to show you how they are parallel.

7 0

3 years ago

Explain why 13x +1 = 11x+9

VLD [36.1K]

Answer:

x=4

Step-by-step explanation:

13x+1 = 11x+9

13x-11x = 9-1

2x = 8

x = 4

5 0

3 years ago

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(-5<br> If m<br> + 7 = 39, what is the value of m?

diamong [38]

Answer:

m=32

Step-by-step explanation:

solve for m by subtracting 7 by both sides. Then you get m = 32

(can i get brainliest please)

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3 years ago

One-third times the difference of a number and 5 is

AfilCa [17]

Answer:

the value of x is 3

Step-by-step explanation:

Hope this helps!!!! :)

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3 years ago