can anyone do these so i can check my answers??
3x^2 – 16x – 7 = 0
Determine the solutions for the following polynomial equation.
(4x + 4)^2 = 49
x = (larger value)
x = (smaller value
An archery enthusiast was testing his new bow. He shot an arrow straight up from the top of a building 128 feet high with an initial velocity of 32 feet per second. The height of the arrow (h measured in feet) after t seconds in flight is described by the equation
.
Determine the number of seconds after the arrow is shot that it will strike the ground.
t = seconds
Favorite Answer
x = -(-16) +/- sqrt[(-16)^2 – 4(3)(-7)] / 2(3)
x = (16 +/- sqrt[340])/6
x = 5.74
x = -0.41
2) square root both sides
4x + 4 = sqrt[49]
4x + 4 = 7 and 4x + 4 = -7
x = 3/4
x = -11/4
3) it seems like you’re missing the equation given here, but…
UP
vf = vi + at
0 = 32 + (-32.2)t
t = 0.99s
find max height
d = di +vit + (1/2)at^2
d = 128 +(32)(.99) + (1/2)(-32.2)(.99)^2 = 143.90ft
time down
d = di +vit +(1/2)at^2
0 = 143.90 + 0 + (1/2)(-32.2)t^2
t = 2.99s
total time = 0.99s + 2.99s = 3.98s
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