Write the sum as a mixed number so the fractional part is less than 1 6 4/5 + 3 3/5

Which triangle congruence postulate or theorem justifies my claim that the steps i made using construction paper and scissors produce an isosceles triangle? was it sss, sas, asa, aas, or hl?

Solve each quadratic equation by factoring and using the zero product property. x^2 + 18x = 9x

2/3(-6y+9x) expand each expression using the distributive property