exam Maths Puzzle Numerical Ability

isbn 0618372628

a rectangular vegetable garden has a perimeter of 64 feet. The length of the garden is 20 feet. What is the width of the garden?

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Susan wants to mix 10 pounds of Virginia nuts that cost 3.50 a pound with spanish nuts that cost 3.00 a pound to obtain a mixture that costs 3.40 a poound. How many pounds of spanish nuts should she use? How exactly do you know the differences between the different conics such as ellipse, circle, parabola, and hyperbola? How do you solve them in order to graph?