What is the value of 8.3 X 10 ? A. eight hundred thousand, thirty B. eighty-three thousand C. eight thousand, three hundred D. eight hundred thirty ( THE 10 HAS AN EXPONENT OF 4)

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

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

Which of the following correctly justifies statement four of the two column proof? a. corresponding angles theorem b. transitive property of equality c. vertical angle theorem d. substitution property of equality