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3 years ago

Given WZ is an altitude of WXY and ZWY=32 find WX

Mathematics

1 answer:

Sergio [31]3 years ago

4 0

Give jdnbhdbdhbfb hbdhbdhdbh hbdhbdhdbh gbdbbdhdhdbbdbdbjbd ,The value of WX is 1 so your answer will be A

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How should i solve number 2 ?

MAXImum [283]

X-1%x^2-2x-3 =0
X-1=0
X=1 , ≠-1 , x≠3

Answer X=1

6 0

3 years ago

Math multiple choice

lisabon 2012 [21]

This one would be b for you to have the right amswer

8 0

3 years ago

Read 2 more answers

Two researchers conducted a study in which two groups of students were asked to answer 42 trivia questions from a board game. Th

Verizon [17]

Answer:

$(21.9-19.8) -1.966\sqrt{\frac{3.4^2}{200} +\frac{3.5^2}{200}}= 1.422$

$(21.9-19.8) -1.966 \sqrt{\frac{3.4^2}{200} +\frac{3.5^2}{200}}= 2.778$

And we are 95% confident that the true difference means are between $1.422 \leq \mu_1 -\mu_2 \leq 2.778$

Step-by-step explanation:

We know the following info:

$\bar X_1 = 21.9$ sample mean for group 1

$\bar X_2 = 19.8$ sample mean for group 2

$s_1 = 3.4$ sample standard deviation for group 1

$s_2 = 3.5$ sample standard deviation for group 2

$n_1 = 200$ sample size group 1

$n_2 = 200$ sample size group 2

We want to find a confidence interval for the difference of means and the correct formula to do this is:

$(\bar X_1 -\bar X_2) \pm t_{\alpha/2} \sqrt{\frac{s^2_1}{n_1} +\frac{s^2_2}{n_2}}$

Now we just need to find the critical value. The confidence level is 0.95 then the significance is $1-0.95 =0.05$ and $\alpha/2 =0.025$ . The degrees of freedom are given by:

$df= n_1 +n_2 -2= 200+200-2= 398$

The critical value for this case would be : $t_{\alpha/2}=1.966$

And replacing into the confidence interval formula we got:

$(21.9-19.8) -1.966\sqrt{\frac{3.4^2}{200} +\frac{3.5^2}{200}}= 1.422$

$(21.9-19.8) -1.966 \sqrt{\frac{3.4^2}{200} +\frac{3.5^2}{200}}= 2.778$

And we are 95% confident that the true difference means are between $1.422 \leq \mu_1 -\mu_2 \leq 2.778$

5 0

3 years ago

A: 2x - 3y = 6

madam [21]

It’s A and B or C and D

4 0

2 years ago

John mows 6 lawns a week and makes 90 dollars. If he made 270 dollars how many lawns did he mow??? Please help im really struggl

tangare [24]

Answer:

Step-by-step explanation:

90 × 3=270 dollars

6×3= 18 lawns

7 0

3 years ago