a) The cost(C) in GH¢ of catering per head in a restaurant with the number (N) of people present is given by C = a + bN . If the cost per head for 10 people is GH¢14 and the cost per head for 20 people is GH¢12, find (to the nearest 10c) the cost per head for 50 people. b) A car which was bought for GH¢9,000 when new was valued at GH¢7,500 at the end of the first year. It then depreciated each year by 1212 of its value at the beginning of the year. Calculate to the nearest whole number the value of the car at the end of the third year. c) Calculate the compound interest on GH¢415 for 112 year at 7% per annum
Equations and Inequations
Equations and inequalities describe the relationship between two mathematical expressions.
Linear Functions
A linear function can just be a constant, or it can be the constant multiplied with the variable like x or y. If the variables are of the form, x2, x1/2 or y2 it is not linear. The exponent over the variables should always be 1.
a) The cost(C) in GH¢ of catering per head in a restaurant with the number (N) of people present is given by C = a + bN . If the cost per head for 10 people is GH¢14 and the cost per head for 20 people is GH¢12, find (to the nearest 10c) the cost per head for 50 people.
b) A car which was bought for GH¢9,000 when new was valued at GH¢7,500 at the end of the first year. It then depreciated each year by 1212 of its value at the beginning of the year. Calculate to the nearest whole number the value of the car at the end of the third year.
c) Calculate the compound interest on GH¢415 for 112 year at 7% per annum
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