Factor this trinomial x^2+x-2

Mathematics

2 answers:

True [87]2 years ago

6 0

Answer:

(x+2) (x-1)

Step-by-step explanation:

x^2+x-2

What 2 numbers multiply together to give -2 and add together to give 1

2 * -1 = -2

2 + -1 = 1

(x+2) (x-1)

Akimi4 [234]2 years ago

4 0

Answer:

(x+2) (x-1)

Step-by-step explanation:

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assume that women's heights are normally distributed with a mean of 63.6 inches and a standard deviation of 2.5 inches. find the

drek231 [11]

Answer:

65.3658 inches

Step-by-step explanation:

Let X be the height of a woman randomly choosen. We know tha X have a mean of 63.6 inches and a standard deviation of 2.5 inches. For an x value, the related z-score is given by z = (x-63.6)/2.5. We are looking for a value $x_{0}$ such that $P(X < x_{0}) = 0.76$ , but, $0.76 = P(X < x_{0}) = P((X-63.6)/2.5 < (x_{0}-63.6)/2.5) = P(Z < (x_{0}-63.6)/2.5)$ , i.e., $(x_{0}-63.6)/2.5$ is the 76th percentile of the standard normal distribution. So, $(x_{0}-63.6)/2.5 = 0.7063$ , $x_{0} =63.6+(2.5)(0.7063) = 65.3658$ . Therefore, the height of a woman who is at the 76th percentile is 65.3658 inches.