Answer:
40 percent
Step-by-step explanation:
60 - 20 = 40
Reasoning: The amount of seniors that attended was 20 percent, so 60 (total students) percent minus 20 percent is equal to 40 percent.
Hope this helps!
Answer:
<h2>a = 1</h2>
Step-by-step explanation:

Answer:
8k+11
Step-by-step explanation:
Combine like terms
9k-k
7+4
9k-k=8k
7+4=11
8k+11