exam Maths Puzzle Numerical Ability

Solve for x: log(z,8) = -3

Simplify:(( log(5,(log(2,32) ))

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exam Other Question

Lina Chen invest $24,000, part at 8% and the rest 7.2%. How much did she invest at each rate if her income from the 8% investment is two thirds that of the 7.2% investment? x=-3
y=2x + 1