BellaRose6612 BellaRose6612 19-01-2018 Mathematics contestada What is the simplified form of (x+5)/(3x+4) + (x+4)/(x+3) A. (2x+9)/(4x+7) B. (4x^2+24x+31)/(3x^2+13x+12) C. (4x^2+24x+31)/(4x+7) D. (2x+9)/(3x^2+13x+12)