Question

Julia finds a texting plan that costs a flat fee of $20 per month for 120 texts, plus $.20 per text after that. Which cost function represents this scenario if x equals the number of texts exceeding 120 that Julia sends in a month?
Answer
C(x) = 120 + .20x
C(x) = .20+ 120x
C(x) = .20 + 20x
C(x) = 20+ .20x

Answer 1

C(x) = 20+ .20x

Answer 2

I think

Answer 3

that's correct.