Select the algebraic definition for the piecewise function graph.

Can someone me with #s 8, 9, and 11. with just one of the three also works. prove using only trig identities.

Rewrite the following quadratic functions in intercept or factored form. show your work. y = 9 + 12x + 4x^2

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