Answer:
a=5
Step-by-step explanation:
15=3a
1. You need to try to get the variable alone, in this case its a
2. So you divide 15 by 3
3. That will give you 5=a or a=5
I can’t see the question b
The probability would be 8/12
I think the answer is 2 weeks 6 days because if over the course of 2 weeks they took 12 I ready quizzes the he needs 18 quizzes and it leaves 1 day extra