What is the sum of the polynomials? (9x4−13x3−x−7)+(7x3−2x+1) a.) −6x^6+9x^4−3x^2−6 b.)−6x^6+9x^4−x−8 c.)9x^4−6x^3−x−8 d.)9x^4−6x^3−3x−6

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

Merrida uses a pattern in the multiplication table below to find ratios that are equivalent to 7: 9. if merrida multiplies the first term, 7, by a factor of 6, what should she do to find the other term for the equivalent ratio? multiply 9 by 1. multiply 9 by 6. multiply 9 by 7. multiply 9 by 9.

If the tip varies directly with the number of guest which equation represents between the tip,t, and the number of guest,g?