My brain capacity can not handle this one right now? anyone good with geometry word problems? it’s number 12 if anyone is able to out you are a blessing

Which expression is equivalent to 5r6141 2r+st6

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

Varies inversely with x. if y=8.5 when x=-1 find x when y=-1