The length of a rectangle is (x + 2). The width of the rectangle is (x^2 + 1). Which
expression represents the perimeter of
the rectangle?
A x2 + x + 3
B 2x2 + 2x + 6
cx + 2x + x + 2
D x + 2x + x + 3
O)

The parabola x = y² - 9 opens: a.)up b.)down c.) right d.)left

Researchers were interested in whether relaxation training decreases the number of headaches a person experiences. they randomly assigned 20 participants to a control group or a relaxation training group and noted the change in number of headaches each group reported from the week before training to the week after training. which statistical analysis should be performed to answer the researchers' question?

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