I don’t understand how to do 8. , 9. , and 10.

Can someone help me please

navik [9.2K]

Answer:

$the \: answer \: is \: choice \: b \: \frac{ - 2 \sin(x) }{1 + \cos(x) }$

will give you an explanation if you want tag me on comment.

4 0

1 year ago

What is the simplified form of the following expression? 2 StartRoot 18 EndRoot + 3 StartRoot 2 EndRoot + StartRoot 162 EndRoot

inna [77]

Answer: 2*√18 + 3*√2 + √162 = 18*√2

Step-by-step explanation:

I guess that the equation is:

2*√18 + 3*√2 + √162

And we want to simplify it.

first 18 = 9*2

then we can write:

2*√18 = 2*√(9*2) = 2*3*√2 = 6*√2

and 162/9 = 18

then we can write:

√162 = √(9*18) = √9*√18 = 3√18

now we can use the previous step: √18 = 3*√2

and:

√162 = 3*(3*√2) = 9*√2

now we can write our equation as:

6√2 + 3√2 + 9√2 = (6 + 3 + 9)√2 = 18*√2

And now we can not simplify it further more, so here we end.

4 0

3 years ago

Samuel used 1/5 of an ounce of butter to make 1/15 of a pound of jelly. How many ounces of butter are needed to make a pound of

Zanzabum

1/5 x 15= 3 ounces of butter needed

8 0

3 years ago

When a river flows, the strength or force of the river depends on how far the river falls vertically compared to how far it flo

strojnjashka [21]

The figure is missing. There are several problems with same wording but different numbers

Here, we can use:

Horizontal distance: 258 feet

Vertical fall: 56.0 feet

Answer:

Slope = 56.0 ft / 258 ft ≈ 0.217

Explanation:

The <em>slope</em> measures how the rate of change of the vertical distance (vertical fall) with respect to the horizontal distance.

There are several forms to express this with words, which represent the same formula. Here are some of them:

Slope = rise / run
Slope = vertical change / horizontal change
Slope = change in y / change in x
Slope = Δy / Δx
Slope = (y₂ - y₁) / (x₂ - x₁)

As said, all those forms mean the same; they are equivalent.

Here, we have vertical fall = 56.0 feet, and horizontal distance = 258 feet, and by specifications of the problem (in the hint) the slope must be positive. Thus, you get:

Slope = vertical fall / horizontal distance = 56.0 feet / 258 feet ≈ 0.217

8 0

3 years ago

Many non-profit groups ask for donations during December. Do men give higher monetary donations than women in the month of Decem

Lelu [443]

Answer:

For this case we want to test if do men give higher monetary donations than women in the month of December (alternative hypothesis) and the complement should be the null hypothesis. So then the sytem of hypothesis are:

Null hypothesis: $\mu_m -\mu_w \leq 0$

Alternative hypothesis : $\mu_m -\mu_w >0$

So then the best option would be:

d. Ha: mum -muw > 0

Step-by-step explanation:

Previous concepts

A hypothesis is defined as "a speculation or theory based on insufficient evidence that lends itself to further testing and experimentation. With further testing, a hypothesis can usually be proven true or false".

The null hypothesis is defined as "a hypothesis that says there is no statistical significance between the two variables in the hypothesis. It is the hypothesis that the researcher is trying to disprove".

The alternative hypothesis is "just the inverse, or opposite, of the null hypothesis. It is the hypothesis that researcher is trying to prove".

Solution to the problem

For this case we want to test if do men give higher monetary donations than women in the month of December (alternative hypothesis) and the complement should be the null hypothesis. So then the sytem of hypothesis are:

Null hypothesis: $\mu_m -\mu_w \leq 0$

Alternative hypothesis : $\mu_m -\mu_w >0$

So then the best option would be:

d. Ha: mum -muw > 0

3 0

3 years ago