Six times a number equals 3 times the number, increased by 12. find the number

Erin bought christmas cards for $2 each to send to her family and friends. which variable is the dependent variable?

1) you deposit $2,500 in an account that earns 4% simple interest. how much do you earn in eight years?

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