20 points each math answer with optional explination Which of the following is not a condition that must be met before you can use the quadratic formula to find the solutions of an equation?
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For which of the following counts would a binomial probability model not be reasonable? a)the number of people in a classroom born in januaryb) the number of people in a classroom with red hair c) the number of people admitted to a hospital in a day with a particular disease d) the number of heart beats in a one-minute perio.

Determine the number of girls in a math class with 87 boys if there are 25 girls for every 75 boys

Evaluate the expression. (9 + 5)(3 + 2)0