Which of the following has no solution?

a.(x + 1 < -1) ∩ (x + 1 < 1)
b.(x + 1 ≤ 1) ∩ (x + 1 ≥ 1)
c.(x + 1 < 1) ∩ (x + 1 > 1)

15. jiovanni is looking in to two different companies that offer study guides for math exams.test prep 101 charges a $5 flat fee and an additional $0.25 per problem.math charges a $2 flat fee and an additional $0.50 per problem.how many prablems would make the costs of the two companies be equal? varibles: equations/eniqualities{ {