Which of the following polynomials has solutions that are not real numbers?

Mathematics

1 answer:

8090 [49]2 years ago

3 0

Assuming this question associates "solutions" with "zeros", then the answer is

x^2 + 2x + 3

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If we set x^2 + 2x + 3 to equal 0, we have

x^2 + 2x + 3 = 0

The discriminant of this equation of the form ax² + bx + c = 0 is

discriminant = b² - 4ac = 2^2 - 4(1)(3) = -8

The discriminant is negative, so there are no real solutions (the discriminant is under a square root in the quadratic equation; square root of a negative number is not a real number)

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74% of freshmen entering public high schools in 2006 graduated with their class in 2010. A random sample of 81 freshmen is selec

Assoli18 [71]

Answer: Probability that the proportion of students who graduated is greater than 0.743 is P = 0.4755

Step-by-step explanation:

Given that,

Probability of freshmen entering public high schools in 2006 graduated with their class in 2010, p = 0.74

Random sample of freshman, n = 81

Utilizing central limit theorem,

$P(\hat{p}$