exam Maths Puzzle Numerical Ability

martin and anna buy books at a sale. martin buys 3 hardcover books and 4 paperback books for $6.50. Anna buys 2 hardcover books and 6 paperback books for $6.00. What is the cost, in dollars, of each hardcover book?

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exam Other Question

Determine whether each of the following trinomials is a perfect square. If it is, factor the
trinomial.

x(squared)-24x+48

thanks Can you please take the time to help me solve this: Using the Simplex Method, maximize P = - 2 x1 + 3 x2, subject to constraints x1 > 0, x2 > 0, x1 + x2 < 1, x1 - x2 < 2, x1 - x2 >