Which shows the equation for the line of best fit for this data? height (thousand ft) 2,3,4,5,6,7,8,9,10,11,12,13 temperature f\deg 78,74,70,62,55,50,46,40,33,31,30,27
a) y=-5x
b) y=5x+87
c) y=-5x+ 87
d) y=5x

The first few steps in solving the quadratic equation 9x2 + 49x = 22 ? 5x by completing the square are shown. 9x2 + 49x = 22 ? 5x 9x2 + 54x = 22 9(x2 + 6x) = 22 which is the best step to do next to solve the equation by completing the square? 9(x2 + 6x + 3) = 25 9(x2 + 6x + 3) = 49 9(x2 + 6x + 9) = 31 9(x2 + 6x + 9) = 103