PLEASE HELP!

If Sean's dad paid $41.40 on a meal that cost $36, what percent tip did he pay?

A) 12%
B) 15%
C) 18%
D) 20%

You paint a 1/2 of a wall in 1/4 hour. how long will it take you to paint one wall

Solve the equation below: (x+4)/6x=1/x a. x=2 b. x=0,2 c. x=-2 d. x=0,-2

The marked price of an article is 25% above its selling price and the cost price is 30% less than its marked price . find the discount percent and gain percent. only a brainlest can solve it i will mark you brainlest