Answer:
It's B.9
Step-by-step explanation:
Because
11+9=20
20+9= 29
29+9= 38
The common difference is positive because the arithmetic sequence is increasing.
You can buy 8 posters with 48.00 19.20x2=38.40 the leftover change isn’t enough to buy more
Answer:
Step-by-step explanation:
(7y)² = 7²×y² = 49y²