X = 8
because 8 x 2 = 16
16 - 9 = 5
5 x 3 = 15
Answer:
D
21/7 is basically 1/3 so it would be C
Step-by-step explanation:
The correct option as per me is (b)
Answer:
B 9, -9
Step-by-step explanation:
x^2 - 81 = 0
Add 81 to each side
x^2 = 81
Take the square root of each side
sqrt(x^2) = sqrt(81)
x = ±9
