Answer:
I think that the answers are B, E, and F.
Step-by-step explanation:
Don't rate me if they are wrong.
Answer:
y = sin(x- pi/2)
Step-by-step explanation:
Please see the attached image to see your graphs.
By simple inspection we can see that the sine is shifted pi/2 to the right.
We know this because sines are periodic functions with a period T = 2*pi
We can also see that the maximum point of the graph (y = 1) got shifted by a fourth of the period.
And finally, since we want to shift the graph to the right, we need to substract from the argument of the sine term.
Answer:
<h2>-4</h2>
Step-by-step explanation:

She began with 20.
If she bought 7 more books and ended up with 17, that means she had ten beforehand. If she had half remaining, we simply double it, thus getting 20.
Answer:
23
Step-by-step explanation:
A square has all equal sides
Lets take x as the side of the square
x+x+x+x=92
4x=92
x=92/4
x=23