During a day a student spends 7 hours sleeping, ¹/4 of the day studying and of the time travelling. what fraction of the day is left for other things?

Let f(x) = x+3 and g(x) = 1/x the graph of (fog)(x) is shown below what is the range of (fog)(x)?

The trigonometric ratios sine and secant are reciprocals of each other

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?