PLEASE HELP!
i need # 15 and #16.

Which graph represents an even function?

Ben is three times as old as samantha, who is two years older than half of michel's age. if michel is 12. how old is ben?

Write a polynomial function f of least degree that has rational coefficients, a leading coefficient of 1, and the given zeros. 3, 4+2i, 1+(sqrt)7 the answer is supposed to be: f(x)=x(^5)-13x(^4)+60x(^3)-82x(^2)-144x+360 what am i doing wrong?