i) x²
ii) (x-10)²
b) (x-10)² = x² - 20x + 100
c) (30-10)² = 400 cm²
d) (x-10)² = 144 => x-10 = √144 => x = 12 + 10 = 22 cm
Answer:
see below
Step-by-step explanation:
The circumference is given by
C = pi *d
C = 15.5 pi
If we approximate pi by 3.14
C = 15.5 * 3.14
C =48.67
If we use the pi button
C =48.69486813
Answer:

Step-by-step explanation:
The standard form of an equation of a circle:

(h, k) - center
r - radius
We have the center (0, 3) and the point (-1.5, 3) on the circumference.
The radius is a distance between given points: r = 1.5.
Substitute:
