ASAP it’s due 1 hour pls answer

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

What value is equivalent to 5 + [5 × (4 + 2)]? a) 35 b) 45 c) 60 d) 110

The distance around the lake is 2 kilometers. ifelena wants to run 14 kilometers this week, howmany laps must she run around the lake