exam Maths Puzzle Numerical Ability

carol,ava and cindy swim at a public pool each day . one day carol swam twice as many laps as ava and cindy swam three more laps than ava. if the women swam 27 laps together, how many laps did each swim?

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exam Other Question

The equation D=1.2√h gives the distance, D, in miles that a person can see to the horizon from a height, h, in feet.

Question: Solve this equation for h. 9. Find the maximum or minimum value of the following quadratics, and the corresponding values of x:
a. y=3x^2+4x+7
b. y=-2x^2-5x+2