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3 years ago

What is 4 times the sum of x y? a. 4 (x y) b. (x y)/4 c. 4 - (x - y) d. 4(x y)

Mathematics

1 answer:

Veronika [31]3 years ago

3 0

Um...4 times the sum of xy.....
4(x + y)

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The diagram shows the width and area of a rectangle.

Mademuasel [1]

Answer:

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Step-by-step explanation:

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2 years ago

The heights of a random sample of 100 women are recorded. The sample mean is 65.3 inches and the sample standard deviation is 3

Keith_Richards [23]

Answer: B. $65.3\pm(2)(0.3)$

Step-by-step explanation:

The confidence interval for the population mean is given by :-

$\overline{x}\pm z_{\alpha/2}\dfrac{\sigma}{\sqrt{n}}$

Given : Sample size : n= 100

Sample mean : $\overline{x}=65.3\text{ inches}$

Standard deviation: $\sigma=3 \text{ inches}$

Level of confidence = 0.95

Significance level : $\alpha=1-0.95=0.05$

Critical value : $z_{\alpha/2}=1.96$

Then, 95% confidence interval for the population mean will be :-

$65.3\pm (1.96)\dfrac{3}{\sqrt{100}}\\\\\approx65.3\pm(2)(\dfrac{3}{10})=65.3\pm(2)(0.3)$

8 0

2 years ago

Read 2 more answers

Graham sold 6 magazines less than double what Adrianne sold, a. Which of the following expressions represents Graham's sales

mrs_skeptik [129]

Answer: 2a-6=g

Step-by-step explanation:

2a-6=g

2 times the amount Adrianne sold minus 6 equals the amount Graham sold.

NOTE: I don’t know which option this is because you did not provide it, so please just select the one that contains my answer (or something similar with just different variables, both variables have to be different though).

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2 years ago

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Fed [463]

Ay=lxl=1 is the answer

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2 years ago

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kolezko [41]

Answer: -18 - -18

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2 years ago