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Maths Puzzle
Numerical Ability
a ladder is placed 10 feet from the building. how long is, to the nearest tenth of a foot, is the ladder, if it reaches 30 feet up the building?
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book Other Question
x+y=1
5x+5y=3
how many solutions are there?
What is (5x^2 + 3x +2)^2
I remember FOIL, but forget this one.