Negate the given statement by changing the existential quantifier to a universal quantifier, or vice-versa.Some people are afraid of the dark.
What will be an ideal response?
No one is afraid of the dark.
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Solve the problem.In statistics, the sampling distribution of the random variable Z = 
is the standard normal distribution, where 
is the sample mean, ? is the population mean, ? is the population standard deviation, and n is the sample size. Simplify this expression.
A. Z = 
B. Z = 
C. Z = ?
(
- ?)
D. Z = 
Simplify the expression.
÷ 
- 
? 
A. 1
B. 
C. 2
D. 25
Factor the polynomial f(x). Then solve the equation f(x) = 0.f(x) = x3 + 5x2 - 9x - 45
A. (x + 3)(x - 3)(x + 5) ; -3, 3, -5 B. (x - 3)(x + 3)(x - 5) ; -3, 3, -5 C. (x + 3)(x + 3)(x - 6) ; 3, -3, 6 D. (x - 3)(x + 3)(x - 5) ; 3, -3, 5
Solve the problem.In a certain city, the cost of a taxi ride is computed as follows: There is a fixed charge of $2.55 as soon as you get in the taxi, to which a charge of $2.20 per mile is added. Find an equation that can be used to determine the cost, C(x), of an x-mile taxi ride.
A. C(x) = 2.20 + 2.55x B. C(x) = 4.75x C. C(x) = 3.25x D. C(x) = 2.55 + 2.20x