Answer:
24x^3+34x^2+53x+8
Step-by-step explanation:
Answer:
45
Step-by-step explanation:
Answer:
D
Step-by-step explanation:
The equation of a circle centred at the origin is
x² + y² = r² ( where r is the radius )
Here r = 15, thus
x² + y² = 15² , that is
x² + y² = 225 → D
That would be a variable, x being one of the most commonly used variables to represent unknown numbers.