SOLUTION: Its completing the square 1.) koko dropped a stone from a bridge to water 100m below. Use the equation h= -4.9t^2, where h is the height and t is the time in seconds, to find the

Algebra ->  Quadratic Equations and Parabolas -> SOLUTION: Its completing the square 1.) koko dropped a stone from a bridge to water 100m below. Use the equation h= -4.9t^2, where h is the height and t is the time in seconds, to find the       Log On


   

Question 980196: Its completing the square
1.) koko dropped a stone from a bridge to water 100m below. Use the equation h= -4.9t^2, where h is the height and t is the time in seconds, to find the number of seconds it took for the stone to reach the water
2.) the area of the rectangular tabletop is 3 square meters, if the width is 0.5 m shorter than the length, what are the dimensions if the table top
Hope anyone can help me solve it :)
Thank you in advance
Answer by josgarithmetic(39630) About Me  (Show Source):
You can put this solution on YOUR website!
#1 is just you plug in the value.

#2
system%28w=L-0.5%2CwL=3%29

%28L-0.5%29L=3

L%5E2-0.5L-3=0

2L%5E2-L-6=0-------Either factor the left side or use formula for general solution of quadratic equation.
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