The answer is 36330 it should be at least
Answer:
The radius is 10
Step-by-step explanation:
Given

Required
The radius
Rewrite as:

Subtract 81 from both sides

Expand

Factorize

Factor out y - 9

Express as squares


The equation of a circle is:

By comparison:


Answer:
a^2
−10a+21
Step-by-step explanation:
(a−7)(a−3)
Apply the distributive property by multiplying each term of a−7 by each term of a−3.
a^2
−3a−7a+21
Combine −3a and −7a to get −10a.
a^2
−10a+21
Answer:
Step-by-step explanation:
She took 29 classes in total