exam Maths Puzzle Numerical Ability

The hypotenuse of a right triangle is 10. One side is 2 less than the other. Find the length of each leg.

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exam Other Question

If f(x)=x(x+3)(x-1), use the interval notation to give all values of x where f(x)>0. Help! PAGE 131 #19
Find and simplify the difference quotient:

f(x + h) - f(x)
-----------------, h does not = 0
h

for the given formula:

f(x) = 1/x</PRE>