Which statements are true about the graph of the function f(x) = x2 – 8x + 5? Check all that apply.

Mathematics

2 answers:

erastovalidia [21]2 years ago

8 0

Answer:

Step-by-step explanation:

The first statement, the fourth statement, and the fifth statement are true. The others are not.

In vertex form, looking at the first statement, you can see that the vertex is located at (4, -11), NOT (-8, 5)

The (x - 4)^2 binomial gives you the axis of symmetry, which is x = 4, NOT x = 5.

Kobotan [32]2 years ago

6 0

Answer:

The first statement, the fourth statement, and the fifth statement are true.

Step-by-step explanation:

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Consider a set of 7500 scores on a national test whose score is known to be distributed normally with a mean of 510 and a standa

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$\mathbb P(X>600)=\mathbb P\left(\dfrac{X-510}{85}>\dfrac{600-510}{85}\right)=\mathbb P(Z>1.059)\approx0.145$

So approximately 14.5% of the scores are higher than 600. This means in a sample of 7500, one could expect to see $0.145\times7500\approx10.86$ scores above 600.