1 An online store sells two types of speaker docks for smartphones. The higher-priced speaker dock sells for R1900, and the lower-priced speaker dock sells for R800. Last week the store sold three times as many lower- priced speaker docks as higher-priced speaker docks. Combined sales totaled R34 400. Indicate how many lower-priced speaker docks did it sell?

 

2 An estate is to be distributed among a wife, three children, and two grandchildren. The children will each receive three times as much as each grandchild, and the wife will receive four times as much as each child. If the estate amounts to R 1 115 000, how much will each person receive? 

3 The average speed of a car over a certain distance is calculated by dividing the total distance travelled by the total time taken. Two towns A and B are 10 km apart, A motorist travels from A to B at an average speed of 20 km per hour, and travels from B to A at an average 40 km per hour.

3.1 Determine the average speed to the motorist for the two trips combined. (i.e. from A to B and the back to A) 

3.2 Determine the speed would the motorist have to average on the return trip from B to A to yield an overall speed of 30km per hour? Assume the motorist has averaged 20km per hour from A to B

4 AutoZone sells a regular car battery for R 700 and heavy-duty model for R1 100. If it sold 40 batteries yesterday for a total of R34 000. Indicate how many of each of the type of and indicate the rand the rand value sales of each type.