mario colected 18 coins mario has four more coins than twice the number of coin luigi has how many coins do luigi have

Two lines that do not intersect are skew. always sometimes or never

Afrequency table of grades has five classes (a, b, c, d, f) with frequencies of 3, 13, 14, 5, and 3 respectively. using percentages, what are the relative frequencies of the five classes?

Solve each quadratic equation by factoring and using the zero product property. n^2 - 49 = 0