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gtnhenbr [62]
3 years ago
11

Which statement about the following graph is correct?

Mathematics
1 answer:
Vilka [71]3 years ago
4 0
Can you plz attach an image of the graph :O
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What are the answers to 9 and 10?
Marina CMI [18]

Answer:

9. A. AC

10. D. 3

Step-by-step explanation:

:)

6 0
3 years ago
A random sample of 130 students is chosen from a population of 4,500 students. The mean IQ in the sample is 120, with a standard
barxatty [35]

Answer:

120-2.614\frac{5}{\sqrt{130}}=118.85    

120+2.614\frac{5}{\sqrt{130}}=121.15    

Step-by-step explanation:

Information given

\bar X= 120 represent the sample mean

\mu population mean (variable of interest)

s=5 represent the sample standard deviation

n=130 represent the sample size  

For this case we can't set a margin of error just with a % since they not specify 1.13% respect to something for this case we can omit this value

Confidence interval

The confidence interval for the mean is given by the following formula:

\bar X \pm t_{\alpha/2}\frac{s}{\sqrt{n}}   (1)

The degrees of freedom are given by:

df=n-1=130-1=129

The Confidence level is 0.99 or 99%, the significance would be \alpha=0.01 and \alpha/2 =0.005, and the critical value would be t_{\alpha/2}=2.614

And replacing we got:

120-2.614\frac{5}{\sqrt{130}}=118.85    

120+2.614\frac{5}{\sqrt{130}}=121.15    

3 0
3 years ago
Fill in the other coordinate for the line y=23x+3 y = 2 3 x + 3 : (3, )
Igoryamba
23(3) +  3

= 72

Why do you write 2 equations?

5 0
4 years ago
Read 2 more answers
34. The sum of the lengths of the two bases of a trapezoid
Oduvanchick [21]

Answer:

h=6

Step-by-step explanation:

the formula for a trapezoid’s area is to multiply the bases (a and b) by the height of the trapezoid, then divide it all by 2.

so typed out, that would look like:

((a+b) h) / 2

and in the case of this problem:

((22) h) / 2 = 66

so just go ahead and solve it algebraically from there and you’re good!

5 0
3 years ago
Sienna has $8 and is saving $3 per week. Jacob has $6 and is saving $4 per week. Which model represents the equation that can de
8090 [49]

Answer:

B

Step-by-step explanation:

From the given information:

Sienna has $8 denotes the unit blocks of x tiles. So, she saved $3 per week.

This implies that:

8x + 3(1) = 8x + 3

Also,

If Jacob as well had $6 which implies 6x unit block of tiles while he saved $4;

i.e.

6(x) + 4(1) = 6x + 4

So;

the model that can determine when Sienna will have the same amount as Jacob is:

8x + 3 = 6x + 4

7 0
3 years ago
Read 2 more answers
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