4n^2=81 What does n equal?

Eileen purchased 3.4 pounds of apples at the total cost of $19.72. if she purchases 6.2 pounds of apples at this store, how much would it cost?

If angle 2=3x +1 and angle 3=2x +4what is angle 2

How do you write y-10=2 (x-8) in standard form