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3 years ago

I really need help can someone please answer?

Mathematics

1 answer:

diamong [38]3 years ago

6 0

Answer:

D. 2x^{2}+3x+3

Step-by-step explanation:

Use the ordered pairs to determine the correct function

Point (0, 3)

x = 0 and y = 3- options A or D, the others result in y = -3

Point (1, 8)

x = 1, y = 8 - option A.

2*1^2 - 3*1 + 3 = 2 - incorrect

It leaves us with option D

2*1^2 +3*1 + 3 = 8 - correct

Check other two pairs as well:

2*2^2 + 3*2 + 3 = 17
2*3^2 + 3*3 + 3 = 30

This confirms option D is correct

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Answer 2,3,and 4 I really need help thx

77julia77 [94]

Answer:

South is: 2x 5 6x - 3 x + 5

West is: X + 4 (3x)

I'm not sure about the whole perimeter

Please wait for more responses.

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3 years ago

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A researcher estimates the 90% CI for a sample with a mean of M = 8.9 and a standard error (sigma_M) of 2.1. What is the confide

Shalnov [3]

Answer:

The confidence interval at this level of confidence is between 5.4455 and 12.3545.

Step-by-step explanation:

We have that to find our $\alpha$ level, that is the subtraction of 1 by the confidence interval divided by 2. So:

$\alpha = \frac{1-0.9}{2} = 0.05$

Now, we have to find z in the Ztable as such z has a pvalue of $1-\alpha$ .

So it is z with a pvalue of $1-0.05 = 0.95$ , so $z = 1.645$

Now, find M as such

$M = z*s$

In which s is the standard deviation of the sample, which is also called standard error. So

$M = 1.645*2.1 = 3.4545$

The lower end of the interval is the sample mean subtracted by M. So it is 8.9 - 3.4545 = 5.4455

The upper end of the interval is the sample mean added to M. So it is 8.9 + 3.4545 = 12.3545

The confidence interval at this level of confidence is between 5.4455 and 12.3545.

4 0

4 years ago

Given A=(2,-7,6,1) and B=(-9,5,1-1)

Pavel [41]

Answer:

the correct answer is (-7,-2,7,0)

7 0

3 years ago

What is 3/250 as a decimal?

tatyana61 [14]

Hello noble user
Here is your answer
0.01
Good luck!

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3 years ago

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Graph the function.

disa [49]

Answer:

Line passing through $(0,2),(1,-21)$ .

Step-by-step explanation:

$y=-23x+2\\at\ y\ axis\ x=0\\y=-23\times0+2\\y=2$

hence this line passes through $(0,2)$ .

When $x=1$

$y=-23\times1+2\\y=-21$

Hence this line passes through $(1,-21)$ .

Graph is attached.

3 0

4 years ago