Step-by-step explanation:
Given problem;
i. xy, for x = 3 and y = 5
Insert the given parameters and solve;
xy = 3 x 5 = 15
ii. 5a + b, for a = 6 and b = 3,
Insert the given parameters and solve;
5(6) + 3 = 30 + 3 = 33
iii. 6x, for x = 3
Insert the given parameters;
6 x 3 = 18
