Question

Help me?? i suck with math questions sometimes lol

Answer 1

10. y = x² – 2x – 2
y = 4x + 5
(–1, 1) and (–7, –23)
(–1, 1) and (7, 33)
(–1, 33) and (7, 1)
no solution
11. If an object is dropped from a height of 144 ft, the function h(t) = –16t² + 144 gives the height of the object after t seconds. When will the object hit the ground?
1.5 s
3 s
6 s
9 s
12. A ball is thrown into the air with an upward velocity of 28 ft/s. Its height (h) in feet after t seconds is given by the function h = –16t² + 28t + 7. How long does it take the ball to reach its maximum height? What is the ball’s maximum height? Round to the nearest hundredth, if necessary.
1.75 s; 7 ft
0.88 s; 43.75 ft
0.88 s; 17.5 ft
0.88 s; 19.25 ft
13. A catapult launches a boulder with an upward velocity of 148 ft/s. The height of the boulder (h) in feet after t seconds is given by the function h = –16t² + 148t + 30. How long does it take the boulder to reach its maximum height? What is the boulder’s maximum height? Round to the nearest hundredth, if necessary.
9.25 s; 30 ft
4.63 s; 640.5 ft
4.63 s; 1,056.75 ft
4.63 s; 372.25 ft

Answer 2

is this connections achdemy

Answer 3

f you post one question at a time, you'll be more likely to get answers.

Answer 4

lol connections xD

Answer 5

here http://www.wolframalpha.com/input/?i=y+%3D+x%C2%B2+%2B+3x+%E2%80%93+4+and+y+%3D+2x+%2B+2

Answer 6

http://openstudy.com/study#/updates/4f6f2a5de4b0772daa08efa7