exam
Maths Puzzle
Numerical Ability
Bruce discovered that the wishing well contained $9 in nickles and dimes and that there were 30 more dimes than nickles. How many coins of each type were there?
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exam Other Question
Solve foe x:
a) (0.5)^(x+2)=3^x
b) 1/8(16^(2x-1))=(sqrt2)^x
c)2-log(5x)=log(x+1)
Solve by completing the square.
x^2 + 2x - 8 = 0