book Maths Puzzle Numerical Ability

Use the properties of Logarithms to evaluate:
Log sub3 9+Log sub3 36-log sub3 4.

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book Other Question

Determine whether the following equations have a solution or not? Justify your answer.

a) 5x2 + 8x + 7 = 0
b) (7)1/2y2 - 6y - 13(7)1/2 = 0
c) 2x2 + x - 1 = 0
d) 4/3 martin has $5.50 in nickels and dimes in his piggy bank. if there are 20 more nickels than dimes, how many nickels does martin have in his piggy bank.