Answer: a) 45 | b) 60 | c) 150
Explanation:
Let's start with what we know. 15x means 15 multiplied times x. So for the different values of x we just plugin different numbers.
a) For the first one 15 * 3 = 45.
b) For the second one 15 * 4 = 60.
c) For the third one 15 * 10 = 150.
So, to my knowledge, the question was just asking you to evaluate different values of x multiplied by 15.