Is it positive or negative or none
2 answers:
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Answer:
The probability that a child with a rash does not have a fever is 22%
Step-by-step explanation:
1. Probability of having fever:
2. Probability of not having fever:
3. Probability of fave fevers and a rash:
4. Probability of having a rash but not a fever:
5. Probability of having a rash:
6. Probability a child with a rash does not have a fever
22% of the child at the doctor's office with a rash does not have a fever.
1) A quadratic will have no real roots when its discriminant is negative
Dividing by 4,
We have a positive coefficient on k^2 so this parabola is a CUP (concave up positive) so has a minimum at the vertex. If the vertex y value is less than zero, the inequality will be true in the range between the zeros.
That's true for
2) We look for the meet of the line and the parabola:
For two intersections we need a positive discriminant:
That's means two negative or two positive, so
or