Will mark brainliest if answers are correct and give a thanks with rating of 5. I'm being timed I need answer as soon as possible. 20 points!!!

Can someone me with #s 8, 9, and 11. with just one of the three also works. prove using only trig identities.

Using graph paper, determine the line described by the given point and slope. click to show the correct graph below.(0, 0) and 2/3

Charlie is at an amusement park that has 18 different rides. each ride costs $1.75. the function c(r) = 1.75r represents the total amount of money that charlie will spend if he goes on r rides, but he never goes on the same one more than once. what domain and range are reasonable for the function?