X is 15because 15-10=5
x= 3*5
x=15
One root is 1.0791561975888, the other is -0.57915619758885.
Answer:
the second one
Step-by-step explanation:
Its measuring by miles per hour
ANSWER:
4th option: y = cosine (x + pi)
STEP-BY-STEP EXPLANATION:
For the function y = cosine (x), when x = 0, y = 1 and when x = , y = -1. The graph shows the opposite, when x = 0, y = -1 and when x = , y = 1, so we must add the same amount x = , for y to be positive 1.
So the equation of the graph would be:

The correct answer is then the 4th option y = cosine (x + pi)