Plzzz !

what is the range of the function f(x) = -|x - 4| + 5?

a. (-∞,5]

b. (-∞,5)

c. [-5,∞)

d. [5,∞)

Which best explains why this triangle is or is not a right triangle?

The parabola opens: y=√x-4 (principal square root) up down right left

10 ! a train starts from grand city and travels toward belleville 388 miles away. at the same time, a train starts from belleville and runs at the rate of 47 miles per hour toward grand city. they pass each other 4 hours later. find the rate of the train from grand city.