Help please I don’t get this

1-for what value of x is line a parallel to line b 2-for what value of x is line a parallel to line b

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?

You paid 28.00 for 8 gallons of gasoline. how much would you pay for 15 gallons of gasoline?