A store pays $70 for a bicycle. the percent of markup is 20%. what is the selling price please help

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?

If the sales price of a dvd is $20 and the markup is 34%, what is the cost of the dvd?

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