Can you me with number 8 <br> Plz nowww

100 POINTS 10 QUESTIONS PLEASE HELP PICTURES BELOW PLEASE SPECIFY WHICH QUESTION YOU ARE ANSWERING

Semenov [28]

Answer:

The answers are $\frac{2}{5}, \frac{1}{4}, \frac{1}{10}, \frac{5}{2}, \frac{5}{8}, \frac{4}{1}, \frac{8}{5},$ and $\frac{10}{1}$ .

Step-by-step explanation:

Proportions are fractions that can be made by using the given numbers, which in this case are 2, 5, 8, and 20. Let's pair each one with the other three and then simplify if possible.

First, let's begin with 2:

$\frac{2}{5} = \frac{2}{5}$

$\frac{2}{8} = \frac{1}{4}$

$\frac{2}{20} = \frac{1}{10}$

Then, let's do 5:

$\frac{5}{2} = \frac{5}{2}$

$\frac{5}{8} = \frac{5}{8}$

$\frac{5}{20} = \frac{1}{4}$

Note that we already have $\frac{1}{4}$ , so we do not need to include an additional one.

Now, let us do 8:

$\frac{8}{2} = \frac{4}{1}$

$\frac{8}{5} = \frac{8}{5}$

$\frac{8}{20} = \frac{2}{5}$

See how we already have $\frac{2}{5}$ , so we won't have to include that as well.

Finally, let's do 20:

$\frac{20}{2} = \frac{10}{1}$

$\frac{20}{5} = \frac{4}{1}$

$\frac{20}{8} = \frac{5}{2}$

Now see that we already have both $\frac{4}{1}$ and $\frac{5}{2}$ , so we won't have to include both of them, as they are both extras.

Hence, the answers are $\frac{2}{5}, \frac{1}{4}, \frac{1}{10}, \frac{5}{2}, \frac{5}{8}, \frac{4}{1}, \frac{8}{5},$ and $\frac{10}{1}$ .

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8 0

3 years ago

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Calculating cos-1 ( help is gladly appreciated :) )

Alekssandra [29.7K]

Answer:

$\frac{3\pi}{4}$

(Assuming you want your answer in radians)

If you want the answer in degrees just multiply your answer in radians by $\frac{180^\circ}{\pi}$ giving you:

$\frac{3\pi}{4} \cdot \frac{180^\circ}{\pi}=\frac{3(180)}{4}=135^{\circ}$ .

We can do this since $\pi \text{ rad }=180^\circ$ (half the circumference of the unit circle is equivalent to 180 degree rotation).

Step-by-step explanation:

$\cos^{-1}(x)$ is going to output an angle measurement in $[0,\pi]$ .

So we are looking to solve the following equation in that interval:

$\cos(x)=-\frac{\sqrt{2}}{2}$ .

This happens in the second quadrant on the given interval.

The solution to the equation is $\frac{3\pi}{4}$ .

So we are saying that $\cos(\frac{3\pi}{4})=\frac{-\sqrt{2}}{2}$ implies $\cos^{-1}(\frac{-\sqrt{2}}{2})=\frac{3\pi}{4}$ since $\frac{3\pi}{4} \in [0,\pi]$ .

Answer is $\frac{3\pi}{4}$ .

4 0

3 years ago

I really need help with this problem?

trasher [3.6K]

7 cm, it’s a step by step equation

3 0

3 years ago

Relationship A has a lesser rate than Relationship B. This table represents Relationship B.

Alja [10]

Answer:

y = 18.1x ; and y = 18x

Explanation:

The rate of change in Relationship B can be found by using the formula for slope:

$m=\frac{y_2-y_1}{x_2-x_1}$

Using the first two points, we have

$m=\frac{73-36.50}{4-2}=\frac{36.50}{2}=18.25$

We know that Relationship A has a lesser rate than this. The choices given for Relationship A are written in slope-intercept form, y=mx+b, where m is the slope and b is the y-intercept (in this case b = 0).

The slope of the first equation is 18.1; this is less than 18.25.

The slope of the second equation is 18.6; this is greater than 18.25.

The slope of the third equation is 18.3; this is greater than 18.25.

The slope of the fourth equation is 18; this is less than 18.25.

6 0

3 years ago

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Which transformation is happening in the image below

Natali5045456 [20]

Answer:Translation

Step-by-step explanation:

4 0