SOLUTION: A football is kicked straight up into the air. Its height above the ground is approximated by the relation y=25x - 5x^2
,where y is the height of the ball in meters and x is the t
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Question 1195453: A football is kicked straight up into the air. Its height above the ground is approximated by the relation y=25x - 5x^2
,where y is the height of the ball in meters and x is the time in seconds.
There are two times when the football is 27.5 m in the air, on the way up and on the way down.
Joe realizes that using the equation
y= 27.5
, he can determine the two times the ball is 27.5
meters in the air. Algebraically or graphically determine these two times.
Answer by MathLover1(20850) (Show Source): You can put this solution on YOUR website!
if
........simplify, divide by
...........use quadratic formula
solutions:
=>
or
=>
these two times are: seconds and seconds
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