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Morgarella [4.7K]
3 years ago
8

Graph y=-3x(squared) +5

Mathematics
1 answer:
saul85 [17]3 years ago
7 0
Your slope will be -3 over 1 and you will start at 5 on the y-axis. So go down 3 to the right 1..
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Write as a single term: cos(2x) cos(x) + sin(2x) sin(x)
GREYUIT [131]

Answer: cos(x)

Step-by-step explanation:

We have  

sin ( x + y ) = sin(x)*cos(y) + cos(x)*sin(y)   (1)   and

cos ( x + y ) = cos(x)*cos(y) - sin(x)*sin(y)  (2)

From eq. (1)

if x = y

sin ( x + x ) = sin(x)*cos(x) + cos(x)*sin(x) ⇒ sin(2x) = 2sin(x)cos(x)

From eq. 2

If x = y

cos ( x + x ) = cos(x)*cos(x) - sin(x)*sin(x)  ⇒ cos²(x) - sin²(x)

cos (2x) = cos²(x) - sin²(x)

Hence:The expression:

cos(2x) cos(x) + sin(2x) sin(x)  (3)

Subtition of sin(2x) and cos(2x)  in eq. 3

[cos²(x)-sin²(x)]*cos(x) + [(2sen(x)cos(x)]*sin(x)

and operating

cos³(x) - sin²(x)cos(x) + 2sin²(x)cos(x) = cos³(x) + sin²(x)cos(x)

cos (x) [ cos²(x) + sin²(x) ]  = cos(x)

since cos²(x) + sin²(x) = 1

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3 years ago
What do these both represent
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Answer:

Step-by-step explanation:

I think A repent 100 and B repent 10

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Please answer <br> And show work please
evablogger [386]

Answer:

The net perfect number would be 28

Step-by-step explanation:

When you add up all the factors of 28 (other than 28) you get 28.

1 + 2 + 4 + 7 + 14 = 28

3 0
3 years ago
The circumference of a circle is 9 cm. What is the diameter?
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Step-by-step explanation:

C=\pi d

9=\pi d\\\frac{9}{\pi } =d\\

5 0
2 years ago
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