Basic Triangle Proofs (Congruence Only - No CPCTC) Given:

AB⊥ BC

AD⊥ DC

BC≅ AD

Prove: △ABC≅△CDA.

Achemist has 200 ml of a 10% sucrose solution. she adds x ml of a 40% sucrose solution. the percent concentration, y, of the final mixture is given by the rational function: the chemist needs the concentration of the final mixture to be 30%. how many milliliters of the 40% solution should she add to the 10% solution to get this concentration?

Using the quadratic formula find the zeros of the given polynomial -5x^2+3x-11

If the scale factor between two circles is 2x/5y what is the ratio of their areas?