exam Maths Puzzle Numerical Ability

When x number of units are sold, the price of each unit (in dollars) is given p=-x/2 + 75. Find the unit price when the following quantities are sold: 2, 7, 9, 11.

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exam Other Question

Need some help. 3 radical symbol x^2 = 4. This is what I got, but for some reason I don't think that's right, but I can't figure out where I went wrong. Can you please check and The sum of two numbers is 36. The difference between the larger number and 8 equals the total of 4 and 3 times the smaller number. Find the 2 numbers