1.The monthly profits (in HK dollars) of Excellent Company from Jan to May 2010 are as follows: 53000,66000,73000,54000,64000
Find the arithmethic mean of the monthly profits in the above period.
2.Vivian walks along a path AB of slope 1/4. If the vertical distance BC is 12m, find the horizontal distance AC.
3. VABCD is a right pyramid with a square base ABCD. ABCD is a horizontal plane. E is the point of intersection of AC and BD. M is the midpoint of AB. Name the angle between the plane VAB and the plane ABCD.
4.Solve the inequality 3x + 1 >_ 10
5. Make X be the subject of the fomula y= X / 1 + X
6. Factorize X^(2) -7X +10
7. Factorize 4X^(2) -4X + 1