The equation of a circle:

(h,k) - the coordinates of the centre
r - the radius
Answer: 60%
Step-by-step explanation:
3/5 times 20 = 60/100
Answer:
5 miles an hour
Step-by-step explanation:
15 divided by 3
Answer:
(3x + 1)²
Step-by-step explanation:
Given
9x² + 6x + 1 ← is a perfect square of the form
(ax + b)² = a²x² + 2abx + b²
Compare like terms to find a and b
a²x² = 9x² ⇒ a² = 9 ⇒ a =
= 3
b² = 1 ⇒ b =
= 1
and 2ab = 2 × 3 × 1 = 6
Thus
9x² + 6x + 1 = (3x + 1)²
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