Which expression can be used to find the sum of the polynomials? (9–3x2) + (+8x2 + 4x + 5) [(-3x2)+(-8x2)] +4x+[+(-5)] [3x2 +8x2] +4x+[9+(-5)] - [3x2+(-8x2}}+4x+[9+5] • [[-342) + (-8x2)] +4x+[9+5]

[15 points]find the quotient with the restrictions. (x^2 - 2x - 3) (x^2 + 4x + 3) ÷ (x^2 + 2x - 8) (x^2 + 6x + 8)

Lines a and b are parallel. what is the value of x? -5 -10 -35 -55

Scores on a university exam are normally distributed with a mean of 78 and a standard deviation of 8. the professor teaching the class declares that a score of 70 or higher is required for a grade of at least “c.” using the 68-95-99.7 rule, what percentage of students failed to earn a grade of at least “c”?