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2 years ago

5

A student took a test which had 6 questions. He would score 8 points on the test if all his answers are correct. If y represents

the student's score when he got x questions incorrect, which graph best represents this situation?

2 answers:

77julia77 [94]2 years ago

6 0

Graph 1 best represents this situation.

ololo11 [35]2 years ago

3 0

Answer:

graph one

Step-by-step explanation: got it right on test

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Write an expression to represent susans age in three years when a represents her present age.

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So our expression would be:
a + 3

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3 years ago

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2 years ago

The perimeter of the square at the left is 48 inches

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The perimeter of the square is 48

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3 years ago

9 Marty conducted a survey in his first period class to determine student preferences for music. Out of 25 students, 14 like hip

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Answer:

C

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3 years ago

Brian Vanecek, VP of Operations at Portland Trust Bank, is evaluating the service level provided to walk-in customers. According

77julia77 [94]

Answer: (14.18, 15.08)

Step-by-step explanation:

Given : Sample size : n= 64

Sample mean : $\overline{x}=15$

Standard deviation : $\sigma=4$

Significance level : $\alpha: 1-0.90=0.1$

Critical value : $z_{\alpha/2}=1.645$

The confidence interval for population mean is given by :-

$\overline{x}\pm\ z_{\alpha/2}\dfrac{\sigma}{\sqrt{n}}\\\\=15\pm(1.645)\dfrac{4}{\sqrt{64}}\\\\\approx15\pm0.82\\\\=(14.18,\ 15.08)$

Hence, the 90% confidence interval for the population mean of waiting times is (14.18, 15.08).

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3 years ago