(A) x = -0.2 is before the ball was thrown, so what do you think?
(B) You want to solve
−4.9x^2+19.5x+1.75 = 10
4.9x^2 - 19.5x + 8.25 = 0
Now just solve using the quadratic formula.
1)The equation y=−4.9x2+8.82x+1.96 represents the height of the trajectory of a ball x seconds after it was released. The solutions to 0=−4.9x2+8.82x+1.96 are x=−0.2 and x=2. Which of these solutions represents the time it takes the ball to hit the ground?(1 point)
a) both x=−0.2 and x=2
b) x=−0.2
c) x=2
d) Neither of the solutions represents the correct time.
2) The equation y=−4.9x^2+19.5x+1.75 represents the height of the trajectory of a ball x seconds after it was released. At what time is the ball 10 meters above the ground?(1 point)
a) The ball never is never 10 meters above the ground.
b) approximately 0.5 seconds and 3.5 seconds
c) approximately 3.5 seconds
d) approximately 0.5 seconds
8 answers
so it sounds like for number one its (a)
and for number 2 its (b)
and for number 2 its (b)
#1 is definitely NOT (a)
#2 is b
#2 is b
then then #1 would be b
how could #1 be B if A is wrong? (And I told you why A is wrong ...)
Do a little thinking here!
Do a little thinking here!
omg im stupid its d) im so sorry for you having to deal with me
*sigh* it's c)
They told you there are two solutions, but x = -0.2 makes no sense, so it must be x = 2
They told you there are two solutions, but x = -0.2 makes no sense, so it must be x = 2
If your seeing this your a legend stay safe :)
1 answer