book Maths Puzzle Numerical Ability

This one has stumped me and my text and notes offer no help. So when in doubt I ask someone with more knowledge than me. Here goes...
"Find an equation of a quadratic function w

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book Other Question

If the length of a rectangle is doubled, dose the area double? why or why not? I need help on finding the probability of drawing a spade and then a club from a standard 52 card deck (without replacement)