Answer:
12a + 3b.
Step-by-step explanation:
3(4a + b)
= 3 * 4a + 3 * b
= 12a + 3b.
Hope this helps!
Answer:
4, 9 and 25.
Step-by-step explanation:
4 because 4 = 2 + 2 ( 2 being prime)
9 because 9 = 7 + 2 (7 being prime).
25 because 25 = 23 + 2 (23 being prime).