exam Maths Puzzle Numerical Ability

Evaluate xy/yz if x = 12, y = -5/4, and z = -4/5

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exam Other Question

draw a worm whose tail end has these expressions in:
3(2x^2 + 7) a ticket master sold 480 tickets. the floor tickets were $30 each and upper $24 each. they made $13,200. how many of each ticket did they sell?