Which best describes the relationship between the successive terms in the sequence shown? 9, –1, –11, –21, … the common difference is –10.  the common difference is 10.  the common ratio is –9. the common ratio is 9.

Multiply −2x(6x^4−7x^2+x−5) express the answer in standard form. enter your answer in the box.

Graph the equation by plotting point x=2

The brain volumes (cm cubed) of 50 brains vary from a low of 904 cm cubed to a high of 1488 cm cubed. use the range rule of thumb to estimate the standard deviation s and compare the result to the exact standard deviation of 175.5 cm cubed, assuming the estimate is accurate if it is within 15 cm cubed