Match the graph with the correct equation

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

When 142 is added to a number the result is 64 more times the number my options are 35 37 39 41

Atorch and a battery cost 2.50 altogether. the torch costs 1.50 more than the battery. what fraction of the total price is the torch? give your answer in its simplest form.