Simplify the expression
expression: 18+3 (9f - 13)
a) 9f - 21 b) 9f + 5
c) 27f - 21 d) 27f + 5

F(n + 1) = f(n) – 8. if f(1) = 100, what is f(6)?

Urgent? will give brainliest to the first correct answer what is the area of the figure?

Lucy is a dress maker. she sews \dfrac47 7 4 ? of a dress in \dfrac34 4 3 ? hour. lucy sews at a constant rate. at this rate, how many dresses does lucy sew in one hour? include fractions of dresses if applicable.