1.3 The family uses pre-paid electricity which is charged at R1.11 per kWh and the
first 50 units are free.
1.3.1 Determine the formula that can be used to calculate the total
cost of electricity.
1.3.2
The family uses 300 kWh of electricity per month, use the formula in
Question 1.3.1 to calculate the total cost of electricity used.
Rico
21 x 15/15
= 15
(3)
4
ed
Please turn over

Imogene invested $8,000 in a bank account that pays 8 percent simple interest at the end of each year. her friend invested the same amount in stocks where the growth of the investment is represented as 2,000 times the square root of 2 less than the time lapsed in years. if y1 and y2 represent the amount earned in dollars and t is the time lapsed in years, which system of equations correctly represents the situation?

The table shows the webster family’s monthly expenses for the first three months of the year. they are $2,687.44, $2,613.09, and $2,808.64. what is the average monthly expenditure for all expenses?

David is spreading mulch on a triangular area of his flower bed. the coordinates of the vertices of the area are (1, 3), (9, 3), and (4, 6). what is the area of the triangle if each square has an area of 3 square feet?