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3 years ago

Please give me a real answer or I will report you I dont want to friend you just put the answers in the comments

Mathematics

1 answer:

kotykmax [81]3 years ago

4 0

Answer:

j = 17.32 sq rt 3 or 30

Step-by-step explanation:

sin 60 = j/20sq rt 3

0.8660 = j/20sq rt 3

j = 17.32 sq rt 3

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Two competing headache remedies claim to give fast-acting relief. An experiment was performed to compare the mean lengths of tim

DaniilM [7]

Answer:

$t = 0.875$

Step-by-step explanation:

Given

Brand A Brand B

$n_ 1= 12$ $n_2 = 12$

$\bar x_1 = 21.8$ $\bar x_2 = 18.9$

$\sigma_1 = 8.7$ $\sigma_2 = 7.5$

Required

Determine the test statistic (t)

This is calculated as:

$t = \frac{\bar x_1 - \bar x_2}{s\sqrt{\frac{1}{n_1} + \frac{1}{n_2}}}$

Calculate s using:

$s = \sqrt{\frac{(n_1-1)*\sigma_1^2+(n_2-1)*\sigma_2^2}{n_1+n_2-2}}$

The equation becomes:

$s = \sqrt{\frac{(12-1)*8.7^2+(12-1)*7.5^2}{12+12-2}}$

$s = \sqrt{\frac{1451.34}{22}}$

$s = \sqrt{65.97}$

$s = 8.12$

So:

$t = \frac{\bar x_1 - \bar x_2}{s\sqrt{\frac{1}{n_1} + \frac{1}{n_2}}}$

$t = \frac{21.8 - 18.9}{8.12 * \sqrt{\frac{1}{12} + \frac{1}{12}}}$

$t = \frac{21.8 - 18.9}{8.12 * \sqrt{\frac{1}{6}}}$

$t = \frac{21.8 - 18.9}{8.12 * 0.408}}$

$t = \frac{2.9}{3.31296}}$

$t = 0.875$

3 0

3 years ago

WILL GIVE BRAINLIEST. please help

kondor19780726 [428]

Answer:

x = 11.4 m

y = 21 m

man's shadow = 9.6 m

Step-by-step explanation:

measure of third angle must be 50 degrees (180 - (40 + 90))

you can take tan50° = 15/y and 'y' will equal approx. 21

to find 'x' you can take tan21° = (21-x) /25 and 21 - x = 25 · tan21°

21 - x = 9.6

-x = -11.4

x = 11.4

man's shadow is the difference of 21 and 11.4, which is 9.6

4 0

3 years ago

Help!!! how many solutions are there to this nonlinear system???

Anna [14]

Answer:

Step-by-step explanation:

No solutions, because the graphs do not intersect.

8 0

3 years ago

How many solutions does s^2 -35=-35 have

Alexandra [31]

Answer:

1 solution

Step-by-step explanation:

s² - 35 = -35

Add 35 to both sides: s² = 0

s can only be 0, and 0 has no positives nor negatives, so one number.

4 0

3 years ago

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ASAP PLZZZZZZZ ANSWER RIGHT

Darina [25.2K]

Answer: ALZ is congruent to AIR by reason ASA

Step by Step Explanation: i hate rsm

8 0

3 years ago