Como resolver 2 SECTION B 11. Shown below are marks obtained by 50 candidates in a certain S4 Mathematics mock examination . 25 30 29 60 72 59 40 40 40 39 62 65 40 59 39 43 58 29 19 25 30 32 56 59 69 90 81 50 31 4545 60 20 31 30 56 58 50 58 50 50 50 50 60 62 70 80 21 40 55 51 49 40 70 (a) () Construct a grouped frequency ta- ble having class intervals of 10 marks, beginning with the 15 - 24 class group . (ii) Use your grouped frequency table to calculate the mean mark of the mock examination . (b) Represent the above mock results on a histogram and use it to estimate the mode .

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1. Factor the equation (x + 2)(x + 3) = 0. 2. Set each factor equal to zero: x + 2 = 0 and x + 3 = 0. 3. Solve for x: x = -2 and x = -3.

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