Using the quadratic formula to solve x2 + 20 2x, what are the values of x?

Will give brainliest sum of arithmetic series (sigma notation) find the numerical answer to the summation given below. (image shown below)

Part a : solve -vp + 40 < 65 for v part b : solve 7w - 3r = 15 for r show your work .

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