Please help.
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If f(x)=3x+1 and f^-1=x-1/3, then f^-1(7)=

Terri makes a quilt using three sizes of fabric squares the side lenght of each fabric square is the square root of the area

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