900. You round up, because it is above 850. :-)
Answer:
the numbers next to a variable is a coefficient, for instance in 2x 2 would be the coefficient.
the constants are the numbers without variables next to them, just numbers
like terms are the term that are similar like 2x and 8x or even 5 and 3
lm not exactly sure what they mean when asking for constant terms.
AB is 6 because of the definition of a midsegment 1/2(12)
This would be 3x + y = 0.
I hope this helps!