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kiruha [24]
3 years ago
15

What is the equation of the graph below?

Mathematics
1 answer:
adelina 88 [10]3 years ago
7 0
Answer: Choice D
y = cos(x+pi)

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

Explanation:

Make sure your calculator is in radian mode. 
If we plug x = 0 into each answer choice, we get the following
Choice A: y = cos(x+pi/2) = cos(0+pi/2) = 0
Choice B: y = cos(x+2pi) = cos(0+2pi) = 1
Choice C: y = cos(x+pi/3) = cos(0+pi/3) = 1/2 = 0.5
Choice D: y = cos(x+pi) = cos(0+pi) = -1

Only choice D has x = 0 lead to y = -1.
Therefore (0,-1) is a point on the equation of choice D. The graph shows this visually through the y intercept, where the graph crosses the y axis.
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What is 82% of 525?<br> Show work
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Step-by-step explanation:

1. We assume, that the number 525 is 100% - because it's the output value of the task.  

2. We assume, that x is the value we are looking for.  

3. If 525 is 100%, so we can write it down as 525=100%.  

4. We know, that x is 82% of the output value, so we can write it down as x=82%.  

5. Now we have two simple equations:

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where left sides of both of them have the same units, and both right sides have the same units, so we can do something like that:

525/x=100%/82%

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7. Solution for what is 82% of 525

525/x=100/82

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525=1.219512195122*x       - we divide both sides of the equation by (1.219512195122) to get x

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