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3 years ago

I need help please, & I don’t know the answer. Thx

Mathematics

1 answer:

Elenna [48]3 years ago

7 0

The train Chug-a-Lug must be going 153.5 miles to match the same speed as Old Steamy so they can arrive at the station at the same time.

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What’s the value of x?<br> 3x-24=x+10

finlep [7]

Answer:

x=17

Step-by-step explanation:

3x-24=x+10

Carry over the like terms and put them together. Make the unknowns which are x the subject.

3x-x= 24+10

2x= 34

2x= 34/2

x= 17

5 0

3 years ago

Read 2 more answers

Suppose that at a state college, a random sample of 41 students is drawn, and each of the 41 students in the sample is asked to

ra1l [238]

Answer:

The confidence interval for 90% confidence would be narrower than the 95% confidence

Step-by-step explanation:

From the question we are told that

The sample size is n = 41

For a 95% confidence the level of significance is $\alpha = [100 - 95]\% = 0.05$ and

the critical value of $\frac{\alpha }{2}$ is $Z_{\frac{\alpha }{2} } =Z_{\frac{0.05 }{2} }= 1.96$

For a 90% confidence the level of significance is $\alpha = [100 - 90]\% = 0.10$ and

the critical value of $\frac{\alpha }{2}$ is $Z_{\frac{\alpha }{2} } =Z_{\frac{0.10 }{2} }= 1.645$

So we see with decreasing confidence level the critical value decrease

Now the margin of error is mathematically represented as

$E = Z_{\frac{\alpha }{2} } * \frac{s}{\sqrt{n} }$

given that other values are constant and only $Z_{\frac{\alpha }{2} }$ is varying we have that

$E\ \ \alpha \ \ Z_{\frac{\alpha }{2} }$

Hence for reducing confidence level the margin of error will be reducing

The confidence interval is mathematically represented as

$\= x - E < \mu < \= x + E$

Now looking at the above formula and information that we have deduced so far we can infer that as the confidence level reduces , the critical value reduces, the margin of error reduces and the confidence interval becomes narrower

3 0

2 years ago

What is the area of the trapezoid with height 10 units?

Ainat [17]

Ya but I think its like 40 hope this helps

5 0

2 years ago

Read 2 more answers

What is the surface area?

finlep [7]

Answer:

c. 166

Step-by-step explanation:

area = l x w

surface area = area

8 0

1 year ago

0.5x - 4< 1

Pie

Answer:

5.0-1...............

8 0

2 years ago