Evaluate the expression below when x = -4.
4x2 - 2x × 15

Complete the solution of the equation. find the value of y when x equals to 6 4x+y=20

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

Use the given information to determine the exact trigonometric value.