Sam paid $8.28 for 18 stamps. at this rate, how much would it cost sam to buy 12 stamps

If 1 is divided by the sum of y& 4. the result is equal to 3 divided by 4 .find the value of m?

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?

What are the values of each variable in the diagram below?