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Licemer1 [7]
3 years ago
7

Choose the graph of y = 2 cos x

Mathematics
2 answers:
drek231 [11]3 years ago
5 0
Y = cos x begins at (0,1), descends to (pi/2,0), descends to (pi,-1), ascends to (3pi/2,0), and then ascends to (2pi,1).  This covers only one full period.

The graph of y = 2cost x is the same, except that the amplitudes (y-values) are 2x as great as before:

(0,2), (pi/2, 0), and so on.
Butoxors [25]3 years ago
5 0

Answer:

The graph is in the attachment.

Step-by-step explanation:

The cosine function is periodic. This means that every 2pi, the image is the same.

For y = 2 cos x, the amplitude of the function is given by 2.

The domain of the function is (-∞,∞).

The image of the function is [-2, 2].

<u>For example:</u>

y(0) = 2 cos 0 = 2 . 1 = 2.

y(pi/2) = 2 cos(pi/2) = 2 * 0 = 0.

y(pi) = 2 cos(pi) = 2 * -1 = -2.

y(3pi/2) = 2 cos(3pi/2) = 2 * 0 = 0.

y(2pi) = 2 cos(2pi) = 2 * 1 = 2.

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An asteroid is 10^{8} miles away from earth, and it is traveling at a speed of 10^{5} miles per day.
Inessa05 [86]

Divide the distance by the speed:

10^8 / 10^5 = 10^3 days ( 1,000 days)

6 0
3 years ago
A bag contains Red, Green or Yellow balls. A ball is taken at random from the bag. The probability that it is Red is 0.4 and the
Luba_88 [7]

Answer:

1000 balls

(there are infinitely many solutions to this question; you can scale up 1000, use a different total, etc.)

Step-by-step explanation:

there are, of course, multiple possible numbers,

but the easiest way is to go with 1000, because we can say 375 / 1000 and 400 / 1000

(0.4 + 0.275 + 0.225 = 1)

400 out of 1000 balls are red (400/1000 = 4/10 = 0.4)

375 out of 1000 balls are green (375/1000 = 3.75/10 = 0.375)

225 out of 1000 balls are yellow (225/1000 = 2.25/10 = 0.225)

the question never gave detail as to if the answer should be the <em>lowest</em><em> </em>number of possible balls, so this value is possible.

So, a possible number of balls in this bag is 1000.

3 0
1 year ago
What is the value of x?
allsm [11]
First need to find the length of line LJ

Line LJ = 8sqrt2 * sin(30) = 5.6569

 now use that to find x

x = 5.6569 * sin(45) = 4

6 0
3 years ago
Choose the solutions to the two equation system.<br>6.0 + 3y = 30<br>15+ y = 7​
zloy xaker [14]

Answer:

y= -8 or 8

Step-by-step explanation

30-6= 24

24/3=8

y=8

15+y=7

y=-8

3 0
3 years ago
Help me plssss <br> its for a math test and im braindead atm
Gwar [14]

Answer:

5/8

Step-by-step explanation:

3/8 + 1/4

To add these fractions, you need a lowest common denominator.  Both 4 and 8 "go into" 8, so the lowest common denominator is 8.

In order to change the denominator 4 to 8, you need to multiply both the numerator and the denominator by 2.  So, 1/4 becomes 2/8.

Now, the problem is 3/8 + 2/8.  

You can add the numerators, because the denominator is the same for each fraction.

3/8 + 2/8 = 5/8

5 0
3 years ago
Read 2 more answers
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