Answer:
c
Step-by-step explanation:

Answer:
64
Step-by-step explanation:
8² = 64
9² = 81 ( doesn't fit into 72)
Answer is 4 - x^2 = -16 so the answer is -8 for x.
Step-by-step explanation:
by having two equations that have the same point, you can set the two equations equal to each other
y = 12x + 3, y = x + 1
12x + 3 = x + 1
11x = -2
x = -2/11
when you find the the x value, plug it back into either one of the equations
y = x + 1
y = (-2/11) + 1
y = 11/11 - 2/11
y = 9/11
the point (solution):
(-2/11, 9/11)
6x+3+5x+1=180
x=16
(5*16)+1=81
1=81