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Irina-Kira [14]
3 years ago
10

21 points!!

Mathematics
1 answer:
Bogdan [553]3 years ago
3 0

Answer:

See attached pictures.

Step-by-step explanation:

The sine and cosine functions have the forms: f(x) = C+ A sinBx and f(x) = C + A cosBx. A is the amplitude for each function. The period is found by dividing 2π the absolute value of B or \frac{2\pi}{|B|}. C shifts the function up and down.

The sine function always starts and ends on the x-axis.

The cosine function always starts and ends at the y=A.

6.) The sine function starts at (0,0) then peaks at 5. Comes down to 0 and down to -5 before returning to 0.

The amplitude is 5.

The period is \frac{2\pi}{|2|}=\pi

7.) Here A=3 so the amplitude is 3, B is 1/2 so the period is 4π. Start at (3,0) and descend down to (2π, 0). Go back up to (4π, 3).

8.) Here A = 2 so the amplitude is A. B is 2π so the period is 1. C is 1 so the graph is shifted up a unit.

Start the graph at (0,1) and go up to (0.25,3) and down to (0.5,1) and continue downward to (0.75, -3) then back up to (1,1).

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Please help :) :) :)
Hatshy [7]

<span>A motorboat travels 222 km in 6 hours going upstream.
Rate = distance/time = 222/6 = 37 km/hr
----------------------
It travels 390 km going downstream in the same amount of time.
Rate = distance/time = 390/6 = 65 km/hr
---------
What is the rate of the boat in still water and what is the rate of the current?
Equations:
Upstream: b-c = 37 km/hr
Downstrm: b+c = 65 km/hr</span>

<span>Add and solve for "b":
(2)b = 102 km/hr
b = 51 km/hr (speed of the boat in still water)
-----
Solve for "c":
b+c = 65
51 + c = 65
c = 14 km/hr (speed of the current)</span>


7 0
3 years ago
8+3b+-13 WHO WANTS 99 POINTS XD
LenKa [72]

Answer:

3b - 5

Step-by-step explanation:

8 + 3b + - 13

Combine like terms

8 +-13 = 8 - 13

8 - 13 = -5

Write it out together

3b - 5

4 0
4 years ago
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adoni [48]

Step-by-step explanation:

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4 0
3 years ago
Question 4 PLEASE HELP FAST! ILL GVIE BRAINLIST AND EXTRA POINTS which of the following expression is a factor of x^2 -8x -20
Varvara68 [4.7K]

Answer: A - x-2

Step-by-step explanation:

4 0
3 years ago
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Answer:

Uhm okay

Step-by-step explanation:

Wanna talk I’m bored :/

3 0
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