What is the range of y=-x^2+2x+8

Find the cosine function that is represented in the graph.

Galen sold tickets of his church’s carnival for a total of $2,820. children’s tickets cost $3 each and adult tickets cost $5 each. the number of children’s tickets sold was 30 more than 3 times the number of adult tickets slod. how many children’s ticket and how many adult tickets did he sell?

What are the coordinates of the midpoint of ab? ,1/2) /2,-1) ,-3/2) /2,-2)