Write as an expression or an equation: Two times a number plus six equals 16. help please

The mathematical expression 9€ t means

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

Which equation represents the partial sum of the geometric series?