Answer:
just like you did it all right before the text was released
This is one of the two tired triangles of trig you should memorize. An isosceles right triangle has its sides in ratio
. That means the hypotenuse is the square root of two times either side.

Answer: C
If you didn't know you could write




Answer:
The input (domain) are usually on the left side of the circle.
Domain = [-2, 0, 3, 4, 6]
The output (range) are usually on the right side of the circle.
Range = [-3, -2, 0, 1, 2, 4]
Since the domain of 3 is pointing at two ranges (3, 4) and (3, -3), the x value repeats.
Functions do not have repeating x values.
The picture shown is not a function.
You would multiply 12.50 by 4 because thats how much each lesson is and you go 4 times a month. You then multiply this by 12 because there are 12 months in a year. The answer comes out to $600 a year. Hope this helps. XD