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Mademuasel [1]
2 years ago
6

Please someone help me with either question A) or B), (or both). I literally have no idea how to do these type of questions. Tha

nk you.

Mathematics
1 answer:
makkiz [27]2 years ago
6 0

Answer:

a) is 12 degrees and b) is 125 degrees

Step-by-step explanation:

see attached. first plot your givens on the diagram then use the rules of parallel lines to find the missing angles

The last stage is to use the golden rule of triangles: the sum of interior angles add to 180.

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Maze phrase for fractions
ICE Princess25 [194]
I dont know what your asking but i would like to have the points thanks.
6 0
3 years ago
A study was conducted to determine whether magnets were effective in treating pain. The values represent measurements of pain us
gregori [183]

Answer and Step-by-step explanation: The null and alternative hypothesis for this test are:

H_{0}: s_{1}^{2} = s_{2}^{2}

H_{a}: s_{1}^{2} > s_{2}^{2}

To test it, use F-test statistics and compare variances of each treatment.

Calculate F-value:

F=\frac{s^{2}_{1}}{s^{2}_{2}}

F=\frac{1.26^{2}}{0.93^{2}}

F=\frac{1.5876}{0.8649}

F = 1.8356

The <u>critical value of F</u> is given by a F-distribution table with:

degree of freedom (row): 20 - 1 = 19

degree of freedom (column): 20 - 1 = 19

And a significance level: α = 0.05

F_{critical} = 2.2341

Comparing both values of F:

1.856 < 2.2341

i.e. F-value calculated is less than F-value of the table.

Therefore, failed to reject H_{0}, meaning there is <u>no sufficient data to support the claim</u> that sham treatment have pain reductions which vary more than for those using magnets treatment.

4 0
3 years ago
A random sample of 64 freshmen spent an average of 14 hours per week watching television. the sample standard deviation was 32 h
NemiM [27]

Answer:

+/- 1.9983

Step-by-step explanation:

The critical values for a confidence interval for the population mean, with population standard deviation not known, are obtained from the student's t distribution.

The sample size is given as 64. The degrees of freedom will thus be;

sample size - 1 = 64 - 1 = 63

The confidence level is given as 95%. The level of significance will thus be;

100 - 95 = 5%.

The area in the right-tail will thus be 2.5%. Therefore, we looking for a t-value such that the area to its right is 2.5% and the degrees of freedom being 63. From the t-tables we have;

+/- 1.9983

3 0
3 years ago
Find the length of AB
kondor19780726 [428]

Answer:

35.6 units

Step-by-step explanation:

By intersecting chords theorem:

10*x = 16*16

10x = 256

x = 256/10

x = 25.6

AB = 10 + x

AB = 10 + 25.6

AB = 35.6

8 0
3 years ago
Write the reciprocal of<br> a) 7/10<br> b)3.5
Thepotemich [5.8K]

Answer:

a)

\frac{10}{7}

b)

\frac{10}{35}

Step-by-step explanation:

The reciprocal of a number is the inverse of the number

\frac{7}{10}  =  \frac{10}{7} (reciprocal)

3.5 \: is \: also \:  \frac{35}{10}

\frac{35}{10}  =  \frac{10}{35} (reciprocal)

you \: may \: choose \: to \: simplify \: to \: the \: lowest \: term \: depending \: on \: the \: question

7 0
2 years ago
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