exam Maths Puzzle Numerical Ability

Perform the indicated operation

-2a� 20a
3a� ˚ 15a�

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exam Other Question

express the following ratio having the same units in the numerator and denominator: 1 1/2 hours to 50 minutes. Please help slove algebraically log base 4 (x+41)- log base 4(2x-5)=2