Penn stacks all his snowballs in a square pyramid. the number of snowball, p(n) in n layers of the square pyramid is given by p(n)= p(n-1) +n2

which could not be the number of snowballs penn has?

a: 5

b: 30

c: 25

d: 14

Simplify. −4x^2 (5x^4−3x^2+x−2) −20x^6−12x^4+8x^3−8x^2 −20x^6+12x^4−4x^3+8x^2 −20x^8+12x^4−4x^2+8x −20x^6+12x^4+4x^3−8x^2

Which of the following graphs could represent a cubic function?

White shapes and black shapes are used in a game. some of the shapes are circles. while the rest are squares. the ratio of the number of white shapes to the number of black shapes is 5: 11. the ratio of the number of white cicrles to the number of white squares is 3: 7. the ratio of the number of black circles to the number of black squres is 3: 8. work out what fraction of all the shapes are circles.