9(x + y) = 9x + 9y what algebraic property is that

Enter the number of complex zeros for the polynomial function f(x) = x 4+ 5x² +6

For each proportion find the unknown number x 1/5/8=×/15

Jacob signs up to work for 2 1/2 hours at the school carnival. if each work shift is 3/4 hour, how many shifts will jacob work? (i just want to double check : |, for anybody that responds! : )