book
Maths Puzzle
Numerical Ability
Joe digs a ditch in 3.2 hours.
Joe working with George can did the same length ditch in 2.7 hours.
How long would it take George to dig the ditch by himself.
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book Other Question
If a parabola goes through points (-1,3), (2,7), (4,-3), what is its vertex.
I am lost on this one. I thought I had it but I can not find it.
Thanks for your help
-Ryan
Passes through (8,3) is perpandicular to y=4x+11
a) y=-4x+35
b) y=4x-29
c) y=-1/4x+5
d) y=1/4x+1