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2 years ago

Question help the construction of the tminus−statistic for a oneminus− and a twominus−sided hypothesis

1 answer:

5 0

The construction for the two sided and one sided hypothesis is the same so the answer is letter d. the explanation behind this is: If you use a two-tailed test it just means that you need to allot half of your alpha to testing statistical significance. If your alpha is equal to 0.05, then this means that 0.025 must be in each tail of the distribution while for the one-tailed test, you will only allot your alpha in one-side.

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The short side of a triangle is always opposite the

Goryan [66]

That would be B
- smallest angle

7 0

2 years ago

simplify the following expression: (x+7/4x) + (5/x-8) I also attached a photo of the problem if you get confused on how I typed

Gnoma [55]

Answer:

$\frac{x^{2} + 19x - 56}{4 {x}^{2} - 32x}$

Step-by-step explanation:

Start by making the denominators of both fraction the same. This can be done by multiplying one fraction's denominator by the other.

After simplifying and combining the two fractions together, check if the numerator can be factorised such that there is a common factor in the denominator and numerator. In this case, the numerator cannot be factorised.

Lastly, expand the denominator.

$\frac{x + 7}{4x} + \frac{5}{x - 8}$

$= \frac{(x + 7)(x - 8)}{4x(x - 8)} + \frac{5(4x)}{4x(x - 8)}$

$= \frac{x(x) + x( - 8) + 7(x) + 7( - 8) + 20x}{4x(x - 8)}$

$= \frac{ {x}^{2} - 8x + 7x - 56 + 20x }{4x(x - 8)}$

$= \frac{ {x}^{2} + 19x - 56}{4x(x - 8)}$

$= \frac{ {x}^{2} + 19x - 56}{4 {x}^{2} - 32x}$

7 0

2 years ago

What is the value of 5^-2

Genrish500 [490]

It is -25

im practically a math genuis

3 0

3 years ago

Read 2 more answers

When do u evaluate exponents in the order of operations?? <br> Pls help I got 9 minutes to do this

wlad13 [49]

Answer: Great more than happy to help!

Exponents come 2nd in line for PEMDAS (order of operations).

Once you finish the parenthesis, you move on to the exponents.

Step-by-step explanation:

6 0

3 years ago

Read 2 more answers

Zaheer, a boy of height 1.5m was watching the entire programme. Initially he observed the top of theflagpoleat an angle of eleva

torisob [31]

Answer:

$h = 15.163\ meters$

Step-by-step explanation:

(Assuming the correct angles are 30° and 45°)

We can use the tangent relation of the angle of elevation to find two equations, then we can use these equations to find the height of the pole.

Let's call the initial distance of the boy to the pole 'x'.

Then, with an angle of elevation of 30°, the opposite side to this angle is the height of the pole (let's call this 'h') minus the height of the boy, and the adjacent side to the angle is the distance x:

$tan(30) = (h - 1.5) / x$

Then, with an angle of elevation of 45°, the opposite side to this angle is still the height of the pole minus the height of the boy, and the adjacent side to the angle is the distance x minus 10:

$tan(45) = (h - 1.5) / (x - 10)$