Minus the 10 from the 50, which makes 40. then divide 40 by 8
50-10=40
40÷8=5
n=5

I'm not sure why ± that sybol isn't working
all together you can write

Ughh just ignore the "A" symbol .-.
Answer:
the table should show the data
A cube number is an integer which is a third power of another integer.
A triangular number is a number that counts the objects that can form equilateral triangle (sorry, I cribbed it a little from Wikipedia; it's difficult to explain). Just look at the picture.
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