Jacob and Sara went to a restaurant, Jacob ordered a sandwich combo for $8.99 and Sarah ordered a salad combo for $7.95. They agreed on an 18% tip and that they would split the check evenly in half. How much, to the penny, did each of them spend?

Me solve this problem, and someone clearly explain to me how to solve it.1.) use the value of the discriminant to determine if the given trinomials has 2 real solutions, 1 real solution, or no real solutions. a.  x2  − 4x  − 7 = 0b. 4r2  + 11r  − 3 = 0c. 3m2  + 7 = 0d.  t2  + 2t  + 1 = 0