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4 years ago

Which property is shown?

Mathematics

1 answer:

balandron [24]4 years ago

3 0

B additive inverse property

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Select the true statement.

Romashka [77]

Answer: c

Step-by-step explanation:

Because both are slopes its confusing but its c bc its in the even quadrant

6 0

4 years ago

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If 8 out of 20 students in a class are boys, what percent of the class is made up of girls?

Westkost [7]

Answer:

60%

Step-by-step explanation:

8 is 40% of 20, therefore the girls would make up 60% percent of the class.

8 0

4 years ago

Find the angle between the given vectors to the nearest tenth of a degree.

pochemuha

$\bf \textit{angle between two vectors }\\ \quad \\
cos(\theta)=\cfrac{u \cdot v}{||u||\ ||v||} \implies \cfrac{\text{dot product}}{\text{product of magnitudes}}\\ \quad \\\\
\theta = cos^{-1}\left(\cfrac{u \cdot v}{||u||\ ||v||}\right)\\\\
-----------------------------\\\\
\theta=cos^{-1}\left[ \cfrac{\ \textless \ 8,4\ \textgreater \ \quad \cdot \quad \ \textless \ 9,-9\ \textgreater \ }{(\sqrt{8^2+4^2})(\sqrt{9^2+(-9)^2})} \right]$

$\bf \theta=cos^{-1}\left[ \cfrac{(8\cdot 9)+(4\cdot -9)}{(\sqrt{64+16})(\sqrt{81+81})} \right]\implies \theta=cos^{-1}\left[ \cfrac{36}{(\sqrt{80})(\sqrt{162})} \right]
\\\\\\
\theta=cos^{-1}\left[ \cfrac{36}{(\sqrt{80})(\sqrt{162})} \right]\implies 
\theta=cos^{-1}\left[ \cfrac{36}{\sqrt{12960}}\right]
\\\\\\
\theta=cos^{-1}\left[ \cfrac{36}{36\sqrt{10}}\right]\implies \theta\approx 71.565^o$

6 0

4 years ago

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KN + 4f = 9v solve for n

marishachu [46]

There is no n just N

so for N will be

N = (9v -4f)/K

hope helped

7 0

4 years ago

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Using radians find the amplitude in period of each function then graph. Question 9

sleet_krkn [62]

we have the function

$y=\frac{1}{2}sin4\theta$

Remember that

The Amplitude is the height from the center line to the peak (or to the trough). Or we can measure the height from highest to lowest points and divide that by 2

In the general form of the equation of the sine

$y=Asin(B(x+c))+D$

The amplitude is the factor A

In this problem

The amplitude is 1/2

using a graphing tool

Note that the amplitude is the height from the center line to the peak (the center line is the x-axis, so the distance is 0.5.

6 0

2 years ago