Please help with trigonometry !

Compare the cost of the bike trips from the two companies shown.for both the cost in a linear function of the number of days which statements is true

Aclothing store has the sign shown in the shop window. pani sees the sign and wants to buy 3 shirts and 2 pairs of jeans. the cost of each shirt before the discount is $12, and the cost of each pair of jeans is $19 before the discount. write and simplify an expression to find the amount pani pays if a $3 discount is applied to her total

Solve the triangle. a = 21°, c = 105°, c = 5