Can someone write an equation for me I already did the second part

Adriano loves anime and collects toys from his favorite series.each month he gains 4 toys. if adriano has 3 toys when he starts collecting, how many does he have after 4 months

The center of a circle represent by the equation (x+9)^2+(y-6)^2=10^2 (-9,6), (-6,9), (6,-9) ,(9,-6)

What happens to the area as the sliders are adjusted? what do you think the formula for the area of a triangle is divided by 2?