15,30,'s next i don't like math at all

Find the center and the radius of the circle with the equation: x^2-2x+y^2+4y+1=0?

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

Edger needs 6 cookies and 2 brownies for every 4 plates how many cookies and brownies does he need for 10 plates