Cindys grandmother is five times her age. find each of their ages if the sum of their ages is 90

What is the value of the digit 1 in the number 13?

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

Write the equation in general quadratic form: plz !