3 years ago

(25 POINTS) PLEASE HELP WILL GIVE BRAINLIEST, THANKS AND 5 STAR RATING!!! 5 QUESTIONS SHOW WORK!

Mathematics

1 answer:

marysya [2.9K]3 years ago

8 0

Answer:

Step-by-step explanation:

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Rachelle buys a drink. She spends the same amount of money on her drink as Chuck spent on his candy. Rachelle now has only 1/3 o

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Answer:

$1.80

Step-by-step explanation:

2/3x = 1.2

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x = 1.2 * (3/2)

x = 1.80

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2 years ago

Look at the image. (calculus)

mash [69]

<h3>Answer: Choice H) 2</h3>

=============================================

Explanation:

Recall that the pythagorean trig identity is $\sin^2 x + \cos^2x = 1$

If we were to isolate sine, then,

$\sin^2 x + \cos^2x = 1\\\\\sin^2 x = 1-\cos^2x\\\\\sin x = \sqrt{1-\cos^2x}\\\\$

We don't have to worry about the plus minus because sine is positive when 0 < x < pi/2.

Through similar calculations, $\cos x = \sqrt{1-\sin^2x}\\\\$

Cosine is also positive in this quadrant.

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So,

$\frac{\sqrt{1-\cos^2x}}{\sin x}+\frac{\sqrt{1-\sin^2x}}{\cos x}\\\\\frac{\sin x}{\sin x}+\frac{\cos x}{\cos x}\\\\1+1\\\\2$

Therefore,

$\frac{\sqrt{1-\cos^2x}}{\sin x}+\frac{\sqrt{1-\sin^2x}}{\cos x}=2$

is an identity as long as 0 < x < pi/2

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2 years ago

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AlexFokin [52]

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Find the two intersections of the lines. The value of x of the intersections will satisfy the system of equations.
Brainliest pls!

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2 years ago

What is the result when the number 25 is increased by 20

STALIN [3.7K]

Answer:

Step-by-step explanation:

$25 + 20$

$45$

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3 years ago

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serg [7]

Your answer well be 8

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3 years ago