3 years ago

Heather had $89.50 in a bank account. She withdrew $10.25. What was her new balance?

Mathematics

1 answer:

dem82 [27]3 years ago

7 0

Answer:

79.25

Step-by-step explanation:

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anzhelika [568]

Answer:

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3 years ago

A charity fundraiser charges 102 dollars per plate. If there are 85 guests at the fundraiser , how much money did they earn

Naddik [55]

Answer:

8,670

Step-by-step explanation:

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3 years ago

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The solution to 4p+2<2(p+5) is

gizmo_the_mogwai [7]

Answer:

p<4

Step-by-step explanation:

4p+2< 2(p+5)

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3 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.

-------------

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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1. The county fair charges $1.25 per Sicket for the rides. Jermaine bought 25 tickets for the rides and spent a

schepotkina [342]

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