If a *b means 2a + b, then what is 2*5?

A: 7
B: 9
C: 12
D: 14
E: none of the above

Which number produces a rationale number when multiplied by 1/5

2x minus y equals 6, x plus y equals negative 3

The customer price index(cpi), which measures the cost of a typical package of customer goods,was 208.8 in 2011 and 244.1 in 2016.let x=11 corresponding to the year 2011 an estimate to cpi into 2013 and 2014. assume that the data can be modeled by a straight line and the trend to continue idenfinitely.use data points to find such a line and then estimate the requested quantities