Ill mark the brainliest if you me with the these three questions 7,8,9

Write a function that matches the description. a cosine function has a maximum of 5 and a minimum value of -5. f (r) =

What is the solution to the system of equations? (–2, –8) (–1, –5) (0, –2) (2, 4)

Me! last question, and i'm stuck! write the algebraic expression that models the word phrase. the product of 2 divided by the number h and 8 more than the number k