Quadratic functions (5 pts) A ball is thrown upward at 40 feet per second from the top of a building that is 30 feet high.
The height of the ball can be modeled by y = 30 + 40x - 16x2 feet where x is the number of
seconds after the ball is thrown. When will the ball first reach a height of 45 feet?

Step-by-step explanation:

0=30+40x - 32x

0=30 + 8x

-8x = 30

x = -15/4

connie < felicia < stew

step-by-step explanation:

stew:

we need to find the slope

m = (y2-y1)/ (x2-x1)

    = (2650-795)/(10-3)

    = 1855/7

265 words per minute

connie:

we need to find the slope

m = (y2-y1)/ (x2-x1)

we have two points (0,0) and (4,800)

m = (800-0)/(4-0)

  m = 800/4

    200 words per minute

felicia:

260 words per minute

200< 260 < 265

connie < felicia < stew

in simplified version   it would be x ≤-4

step-by-step explanation:

multiply each term in x ≤-4 by -1