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aleksley [76]
3 years ago
7

Please help!! 10 extra points

Mathematics
1 answer:
Igoryamba3 years ago
7 0
HEY THERE !!

As we know that cotx= 1/tanx

cot36° = 1/tan36°

=>cot36°= 1/0.726543

=>so cot 36°= 1.376382

So correct answer is option D.


HOPR YOU LIKED.
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Y=-6x + 5<br> x - y = 5
rodikova [14]

Answer:

y = \frac{-25}{7} or -3.571

x = \frac{10}{7} or 1.429

Step-by-step explanation:

x - y = 5

x = 5 + y

Solve for y:

y =  -6x + 5

y =  -6(5 + y) + 5  Substitute x with 5 + y

y = -6(5) - 6y + 5

y = -30 - 6y + 5

y + 6y = -30 + 5

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y = \frac{-25}{7} or -3.571

Solve for x:

x = 5 + y

x = 5 + -25/7

x = \frac{10}{7} or 1.429

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3 years ago
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Answer:

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Roman55 [17]

Answer:

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3 years ago
A metropolitan transportation authority has set a bus mechanical reliability goal of 3,800 bus miles. Bus mechanical reliability
DaniilM [7]

Answer:

(A) T-stat = 1.82

(B) Critical value is 1.645

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Step-by-step explanation:

(A) T-stat (z) = (sample mean - population mean) ÷ sd/√n

sample mean = 3850 bus miles

population mean = 3800 bus miles

sd = 275 bus miles

n = 100

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(B) The test is a one-tailed test. The critical value is obtained from the standard normal distribution table. The critical value using a 0.05 significance level is 1.645

(C) Null hypothesis: The bus mechanical reliability is 3850 bus miles.

Alternate hypothesis: The bus mechanical reliability is less than 3850 bus miles.

Conclusion:

There is sufficient evidence to reject the null hypothesis because the test statistic (1.82) is greater than the critical value (1.645)

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3 years ago
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xz_007 [3.2K]

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