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ad-work [718]
3 years ago
10

Flying against the wind, an airplane travels 4300 kilometers in 5 hours. Flying with the wind, the same plane travels 12,240 kil

ometers in 9 hours. What is the rate of the plane in still air and what is the rate of the wind?
Mathematics
1 answer:
Evgesh-ka [11]3 years ago
8 0

Answer:

250 I’m not 100% sure though.

Step-by-step explanation:

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A certain test preparation course is designed to help students improve their scores on the LSAT exam. A mock exam is given at th
nasty-shy [4]

Answer:

(9.6, 25.7) is a 80% confidence interval for the average net change in a student's score after completing the course.

Step-by-step explanation:

We have n = 6, \bar{x} =  17.6667 and s = 13.3367. The confidence interval is given by

\bar{x}\pm t_{\alpha/2}(\frac{s}{\sqrt{n}}) where t_{\alpha/2} is the \alpha/2th quantile of the t distribution with n-1=5 degrees of freedom. As we want the 80% confidence interval, we have that \alpha = 0.2 and the confidence interval is 17.6667\pm t_{0.1}(\frac{13.3367}{\sqrt{6}}) where t_{0.1} is the 10th quantile of the t distribution with 5 df, i.e., t_{0.1} = -1.4759. Then, we have 17.6667\pm (1.4759)(\frac{13.3367}{\sqrt{6}}) and the 80% confidence interval is given by (9.6, 25.7)

6 0
3 years ago
Which equation is equivalent to 60% of 25? Select all that apply.
den301095 [7]

Answer:

Step-by-step explanation:

60% of 25 is equivalent to:

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8 0
3 years ago
Read 2 more answers
Answer these for 22 points
qwelly [4]
7. Slope of AD = 4/16 = 1/4

8. ΔAEC = 3/12 = 1/4
.. ΔDFB = 2/8 = 1/4

9. The angles at E, G, and F are right angles. Lines CE and BF are parallel, so the alternate interior angles at B and C where the transversal AD crosses them are equal. The triangles of interest are similar by AA~.

10. See problem 7. The ratio is the same.

11. Hard to tell what rule they want you to state. Every axis-aligned right triangle with its hypotenuse on AD will have the same ratio of side lengths. (That's one of the features of the graph of a line. It has the same slope everywhere, measured over any distance.)
5 0
4 years ago
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