Please help :) also please don’t take advantage of the points. it’s multiple choice

a: 70
b:60
c:50
d:40
e:35

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

7x+8y=-18, 4x-9y=-3 solve the system of equations

Taking algebra two apex courses and need with these questions