Which two numbers add to -10 and multiply to 9

An appliance salesman sets a goal to sell an average of 6 appliances per day for the first two weeks of his new job. the dot plot shows the number he sold each day during the first 13 days. what is the minimum number of appliances he must sell on the 14th day in order to reach his goal? a) 5 b) 6 c) 7 d) 8

Its worth 10000000 points need asap if you answer correctly ill mark brainliest

15/16 as a decimal rounded to the nearest hundredth