Answer:
Step-by-step explanation:
So this is a quadratic sequence.
3, 12, 22, 33, 45, 58, 72
9 10 11 12 13 14
9, 10, 11, 12, 13, 14
1 1 1 1 1
This means the next one must be 15 so
3, 12, 22, 33, 45, 58, 72, x
9 10 11 12 13 14 15
x= 72+15
x= 87
D.) 9√2
a^2 + b^2 = c^2
x^2 + 8^2 = √226^2
x^2 + 64 = 226
x^2 = 226 - 64
x^2 = 162
√x^2 = √162
√162 = √81 • √2
√81 = 9
√2 = √2
9√2