Solution We can start by substituting the given information into the required relation. 36x² -36 > 65x Subtracting the right side and factoring gives 36x² -65x -36 > 0 (9x +4)(4x -9) > 0
The product of these factors will be greater than zero when both factors are negative or both are positive. They change sign at x = -4/9 and x = 9/4. Hence, the solution is x < -4/9 or 9/4 < x
It would be mean. The mean is the average that is you are looking for, since she wants a summerization of all the values in the data set. To find the mean (average) add all the numbers and then divide by the amount of numbers.