exam Maths Puzzle Numerical Ability

A cabin cruiser travles 20 miles in the same time that a power boat travels 40 miles. the cruiser travels 5 mph slower than the power boat. Find the speed of each boat.

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exam Other Question

How do you factor 4x^2+6xy+9y^2? Could you please help me? #52. Decide all values of b in the following equations that will give one or more real number solutions.
A). 3x^2+bx-3=0
B). 5x^2+bx+1=0
C). -3x^2+bx-3=0
D). Write a rule