exam Maths Puzzle Numerical Ability

If you bought 850 Douglas firs and ponderosa pines and paid an average of $300 for douglas firs and $225 for ponderosa pines and the total you spent was $217,500 how many of each tree did you buy?

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exam Other Question
fourteen is three times the difference of a number and 6. write an equations
14 = 3(x - 6)
 triangle ABC has P on AC, Q on AB, and angle APQ equal to the angle B. The lengths AP = 3, AQ = 4, and PC = 5 are given. Find the length AB.