I'll give brainiest to correct two math questions < 3

Classify the polygon by its number of sides. state whether the polygon appears to be regular or not regular. a.heptagon, regular b. heptagon, not regular c. octagon, regular d. octagon, not regular

Complete the solution of the equation. find the value of y when x equals -5. -4x - 8y = -52

The function v(r)=4/3pir^3 can be used to find the volume of air inside a basketball given its radius. what does v(r) represent