7. Use the distance formula to determine if the three points, A(1, 3),B(-2,4), and C(1,4), form a right triangle. ​

Can someone pls ! pls answer all. no explanation needed..

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

15 and 14.7 are 1 apart, so 15 – 14.7 must be 1.