What two numbers multiply to get 18 but add to get -12

Write the sine and cosine values of a, b, respectively, in the figure for (1) and (2) + explanation.

Construct the graph that models the given situation

Atruck can be rented from company a $50 a day plus $0.60 per mile. company b charges $20 a day plus $0.80 per mile to rent the same truck. find the number of miles in a day at which the rental costs for company a and company b are the same