What’s the answer and how did you get to it

Answers

Answer 1

Answer:

Answer: Perpendicular

Step-by-step explanation:

when you have parallel lines, you have the same slope. With perpendicular lines, its opposite slopes. 1/3 flipped is 3/1 or 3. Then you change the sign. Therefore, the perpendicular slope of 1/3 is -3.

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Answers

Answer: The answer is A (32)

Step-by-step explanation:

you multiply 8 times 4 and you get 32.

What is the image of (1, -6) for a 270° counterclockwise rotation about the origin?

Answers

Answer:

6,1

Step-by-step explanation:

Y = 1.10x + 5.00
y = 1.50x + 3.00
(substitution)

Answers

Answer:

x=5 and y=10.5

Step-by-step explanation:

(a) For a normal distribution, find the z-score that cuts off the bottom 55.76% of all the z-scores. Round to 2 decimal places after the decimal point. answer: (b) For a normal distribution, find the z-score that cuts off the top 77.52% of area. Round to 2 decimal places after the decimal point. answer:

Answers

Answer:

a) Z = 0.15

b) Z = -0.76

Step-by-step explanation:

Problems of normally distributed samples are solved using the z-score formula.

In a set with mean $\mu$ and standard deviation $\sigma$ , the zscore of a measure X is given by:

$Z = (X - \mu)/(\sigma)$

The Z-score measures how many standard deviations the measure is from the mean. After finding the Z-score, we look at the z-score table and find the p-value associated with this z-score. This p-value is the probability that the value of the measure is smaller than X, that is, the percentile of X. Subtracting 1 by the pvalue, we get the probability that the value of the measure is greater than X.

(a) For a normal distribution, find the z-score that cuts off the bottom 55.76% of all the z-scores.

Bottom 55.76% of the scores are the z-scores with a pvalue of 0.5576 and less. So the z-score that cuts off these scores is Z when X has a pvalue of 0.5576, which is Z = 0.145, rounded to two decimal places, Z = 0.15.

(b) For a normal distribution, find the z-score that cuts off the top 77.52% of area.

The top 77.52% of the scores are the z-scores with a pvalue of 1-0.7752 = 0.2248 and higher. So Z = -0.764 and higher. So the value that cuts off the top 77.52% is Z = -0.76.

Assume that you plan to use a significance level of α = 0.05 to test the claim that p1 = p2. Use the given sample sizes and numbers of successes to find the pooled estimate. Round your answer to the nearest thousandth. n1 = 677 n2 = 3377
x1 = 172 x2 = 654