3 years ago

Solve for n. 8 3/4 + n + 2 3/8 + 4 1/2 = 23 1/8 A. 7 1/2 B. 8 3/8 C. 15 5/8 D. 8 4/8

1 answer:

8 0

You can change all of these to decimals and then solve or get common denominators.
8.75 + n + 2.375 + 4.5 = 23.125
15.625 + n = 23.125
Subtract 15.625 from both sides
n = 7.5

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Simplify the expression cos x cot x+ sin x please select the best answer from the choices provided a.0, b.csc x, c. Tan x, d sec

expeople1 [14]

Answer:

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$cos x \frac{cos x}{sin x} + sin x$

$\frac{cos^2 x}{sin x} +sin x$

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Solving for $cos^2 x$ we got $cos^2 x =1 -sin^2 x$ and replacing this we got:

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And then the best option for this case would be:

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Step-by-step explanation:

For this case we have the following expression given:

$cos x cot x + sin x$

We know from math properties that the definition for cot is $cot x = \frac{cos x}{sin x}$

If we use this definition we got:

$cos x \frac{cos x}{sin x} + sin x$

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Now we can use the following identity:

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Solving for $cos^2 x$ we got $cos^2 x =1 -sin^2 x$ and replacing this we got:

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And then the best option for this case would be:

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First good answer gets brainiest

matrenka [14]

1/4

since there is 4 letters in the word math

so 1 out of 4

<em>Hope it helps...</em>

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