Answer:
True
Step-by-step explanation:
Answer:
(1,4) and (1,0)
Step-by-step explanation:
These have the same first coordinate and different second coordinates, meaning that it cannot be a function. For it to be a function, the x coordinates have to be different numbers.
81 houses total.

of 81 (27) sold last month.
81 - 27 = 54 houses remaining.

of 54 (36) sold this month.
54 - 36 = 18 houses remaining.
There are 18 houses left to be sold.
Answer:
9
Step-by-step explanation:
6n = n² - 27
n² - 6n - 27 = 0
n² - 9n + 3n - 27 = 0
n(n - 9) + 3(n - 9) = 0
(n - 9)(n + 3) = 0
n = -3, 9