Carlos is participating in a 5-day cross-country biking challenge. He biked for 48, 57, 66, and 68 miles on the first four days How many miles does he need to bike on the last day so that his average (mean) is 59 miles per day?

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

Can someone me out here number 4 plz

Find the area of an equilateral triangle with a side of 6 inches