Compute the value of the discriminant and give the number of real solutions of the Quadratic equation 8x^2+7x+1=0 PLSS HELPP

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?

Pls will give brainliest and all p. s u can zoom in if u cant see plss

You receive 15% of the profit from a car wash how much money do you receive from a profit of 300