Can anyone me with this one? i've done the first part, but i'm confused on what the problem is telling me to do in the second part.

Express the following as a function of a single angle. cos(60) cos(-20) - sin(60) sin(-20)

Awater truck is filling a swimming pool. the equation that represents this relationship is y=19.75x where y is the number of gallons of water in the pool and x is the number of minutes the truck has been filling the pool.

Answer 20 points and brainiest ! on the board, your teacher writes an example of how to find the median. one of the numbers is erased, leaving what is shown, 18, 30, 26,12 22. what is the median? a. 10 b. 20 c. 24 d. 28