Find the solution of each equation if the replacement sets are a= { 4,5,6,7,8 } and b= { 9,10,11, 12,13 }. 4a - 8 = 16

At the beginning of 1974/75,2 years a man invested #2000 in a bank at 12.5% compound interest, if it degree #650 at the end of each two years to pay his son's school fees, after payment of interest to pay his son's school fees, how much did he have left at the beginning of the 1978/79 school year?

Which of the following is not a subset of {1,2,3}?

Point r divides in the ratio 1 : 5. if the coordinates of e and f are (4, 8) and (11, 4), respectively, what are the coordinates of r to two decimal places?