Your answer is 21 for this one.
Each row has two more boxes than the row above. The first row has one box
The boxes in a row form an arithmetic sequence with the first term, a₁ = 1 and the common difference, d=2.
The n-th term is

The sum of n terms is

Answer:
The table will have the following:
Row Number: 1 2 3 4 5 6
Boxes in the row: 1 3 5 7 9 11
Total boxes in the display: 1 4 9 16 25 36
Answer:
t = 5
Step-by-step explanation:

Subtract 19 from 39
Divide by 4
Divide 3 on the numerator and denominator.
Hoped this helped.
~Bob Ross®
Answer:
Very nice to see someone ambitious. You need to answer thouroghly in order to get brainliest. Explain every step, as tiring as it may seem.
Have a good day!