Craig = p points
Marla = 2p points
Nelson = 2p + 5 points
The number pi is a constant, it's the ratio of a circles circumference to it's diameter.
The given expression, 81a^6 - 100, is a difference of two squares. The first term 81a^6 is a square of 9a³. The second term, 100, is a square of 10. The factors of the given expression is therefore, (9a³ - 10) x (9a³ + 10).
Answer: The options are kinda weird
But the solution to x - 12.5 = 17 is x = 29.5, so whichever equation you plug this into is correct is the right equation...
