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NARA [144]
2 years ago
14

Convert each unit of length​

Mathematics
1 answer:
lina2011 [118]2 years ago
5 0
6cm= 600 cm
48,000mm= 48m
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4x - 20 =-44 I need the answer ASAP
Trava [24]

Answer:

x=8

Step-by-step explanation:

44-20=24

24/4=8

3 0
2 years ago
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From a point on the ground 47 feet from the foot of a tree, the angle of elevation to the top of the tree is 35º. Find the heigh
frez [133]

Answer:

Step-by-step explanation:

49.4 degrees

Step-by-step explanation:

In Triangle AXY,

We want to determine the angle of elevation from the point  is standing to the top of the flagpole, which is the angle at V in the diagram.

In Triangle XVY

|VY|=36 feet

Therefore, the angle of elevation from the point  is standing to the top of the flagpole is 49.4 degree to the nearest tenth of a degree.

I think i might of clicked on gthe wrong question sorry

5 0
2 years ago
HELP NOwwwwWWWW ILL GIVE BRAINLIEST
Elza [17]

Answer: -7/3

Step-by-step explanation:

Perpendicular lines have slopes that are negative reciprocals of each other.

6 0
2 years ago
Match each function with its correct description. f(x) = (-x + 1)3(x + 2)2(x − 3) f(x) = (-2x + 1)2(x − 3)2(x + 1) f(x) = (x + 6
Leviafan [203]

Answer:

<em>Pairs The degree of the function is 4, and the leading coefficient is positive. arrowBoth  </em>

<em> </em><em>f(x) = (x + 6)(2x − 3)(x − 1)2  </em>

<em> </em>

<em> The degree of the function is 5, and the leading coefficient is positive. arrowBoth: </em>

<em> </em><em>f(x) = (x − 2)2(-2x − 1)2(-x + 1)  </em>

<em> </em>

<em> The degree of the function is 5, and the leading coefficient is negative. arrowBoth: </em>

<em> f(x) = (-2x + 1)2(x − 3)2(x + 1)  </em>

<em> </em>

<em> The degree of the function is 6, and the leading coefficient is negative. arrowBoth: </em>

<em> </em><em>f(x) = (-x + 1)3(x + 2)2(x − 3)  </em>

5 0
3 years ago
Read 2 more answers
Use the t-distribution and the given sample results to complete the test of the given hypotheses. Assume the results come from r
Sergio [31]

Answer:

(A) The value of t test statistics is 2.767 and P-value is 0.0042.

(B) We conclude that the mean of first group is greater than the mean of second group.

Step-by-step explanation:

We are given the following hypothesis below;

Null Hypothesis, H_0 : \mu_1=\mu_2      {means that the mean of first group is equal to the mean of second group}

Alternate Hypothesis, H_A : \mu_1>\mu_2      {means that the mean of first group is greater than the mean of second group}

The test statistics that would be used here <u>Two-sample t-test statistics</u> as we don't know about population standard deviation;

                            T.S. =  \frac{(\bar X_1-\bar X_2)-(\mu_1-\mu_2)}{s_p\sqrt{\frac{1}{n_1} +\frac{1}{n_2} } }  ~ t__n__1-_n__2-2

where, \bar X_1 = sample mean of first group = 56

\bar X_2 = sample mean of second group = 51

s_1 = sample standard deviation of first group = 8.2

s_2 = sample standard deviation of second group = 6.9

n_1 = sample of first group = 30

n_2 = sample of second group = 40

Also, s_p=\sqrt{\frac{(n_1-1)s_1^{2} +(n_2-1)s_2^{2} }{n_1+n_2-2} } = \sqrt{\frac{(30-1)\times 8.2^{2} +(40-1)\times 6.9^{2} }{30+40-2} }  = 7.482

So, <em><u>the test statistics</u></em>  =  \frac{(56-51)-(0)}{7.482 \times \sqrt{\frac{1}{30} +\frac{1}{40} } }  ~ t_6_8

                                     =  2.767

(A) The value of t test statistics is 2.767.

<u>Also, P-value of the test statistics is given by;</u>

              P-value = P( t_6_8 > 2.767) = 0.0042

(B) <u>Now, at 10% significance level the t table gives critical value of 1.295 at 68 degree of freedom for right-tailed test.</u>

Since our test statistic is more than the critical values of t as 2.767 > 1.295, so we have sufficient evidence to reject our null hypothesis as it will fall in the rejection region due to which <u><em>we reject our null hypothesis.</em></u>

Therefore, we conclude that the mean of first group is greater than the mean of second group.

8 0
3 years ago
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