Which expression can be used to find the surface area of the following triangular prism

Idon’t understand this.. will someone ? will mark brainliest along with 20 points.

When x = 3 and y = 5, by how much does the value of 3x2 – 2y exceed the value of 2x2 – 3y ?

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?