Can somebody please answer this for right now?

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

Atemperature of 1.64◦f corresponds to answer in units of ◦c.

If benito is selecting samples of five values from the table, which row will result in the greatest mean? population data row 1 4 2 2 3 3 row 2 3 3 4 3 2 row 3 2 4 3 4 3 row 4 3 4 4 7 3 row 1 row 2 r