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Nezavi [6.7K]
3 years ago
7

Please help , i know i have to use sine and cosine but i cant seem to get the right answer :)

Mathematics
2 answers:
aleksandr82 [10.1K]3 years ago
6 0

Answer:

91

Step-by-step explanation:

mylen [45]3 years ago
3 0
Its 91 ———————————————
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In fiecare dintre cele trei clase de aVa ale unei scoli sunt 30 de elevi.Din toți elevii de-a Va ,o treime fac fotbal,1 dansuri,
Alenkasestr [34]
I can't understand it can you explain it in English
6 0
3 years ago
The mean income per person in the United States is $44,500, and the distribution of incomes follows a normal distribution. A ran
Artist 52 [7]

Answer:

We conclude that the residents of Wilmington, Delaware, have higher income than the national average

Step-by-step explanation:

We are given the following in the question:  

Population mean, μ = $44,500

Sample mean, \bar{x} = $52,500

Sample size, n = 16

Alpha, α = 0.05

Sample standard deviation, s =  $9,500

a) First, we design the null and the alternate hypothesis

H_{0}: \mu = 44,500\text{ dollars}\\H_A: \mu > 44,500\text{ dollars}

We use one-tailed(right) t test to perform this hypothesis.

c) Formula:

t_{stat} = \displaystyle\frac{\bar{x} - \mu}{\frac{s}{\sqrt{n}} }

Putting all the values, we have

t_{stat} = \displaystyle\frac{52500 - 44500}{\frac{9500}{\sqrt{16}} } = 3.37

b) Rejection rule

If the calculated t-statistic is greater than the t-critical value, we fail to accept the null hypothesis and reject it.

Now,

t_{critical} \text{ at 0.05 level of significance, 15 degree of freedom } = 1.753

Since,                    

t_{stat} > t_{critical}

We fail to accept the null hypothesis and reject it. We accept the alternate hypothesis. We conclude that the residents of Wilmington, Delaware, have higher income  than the national average

5 0
3 years ago
Line t has an equation of y = -8x + 7. Line u includes the point (-1, 7) and is parallel to line
umka2103 [35]

Answer:

y = -8x - 1

Step-by-step explanation:

y = mx + b

7 = -8 (-1) + b   Substitute in points for x and y. Substitute -8 for m (parallel)

7 = 8 + b

-1 = b

8 0
2 years ago
-3 (5 g +1) + 8 g
Komok [63]

Answer:

-7g-3

Step-by-step explanation:

in order to evaluate for this mathematical expression, we need to consider the negative sign carefully and then open the bracket then evaluate.

<u>solutuion</u>

-3 (5 g +1) + 8 g

-15g -3 + 8g

-15g +8g -3

-7g-3

8 0
2 years ago
Please help me find this equation :)
stira [4]
It's -16 just use the app socratic
3 0
2 years ago
Read 2 more answers
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