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4 years ago

8

FIND THE ERROR Given the polynomial expression 3x2+7x−18x−42, Theresa says you need to factor by grouping using the binomials (3

x2−18x)and(7x−42). Akash says you need to use the binomials (3x2+7x) and (-18x-42). Is either of them correct? Justify your answer.

1 answer:

stich3 [128]4 years ago

4 0

Answer:

I think the answer is 6776

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Jenny was shopping and found a bag that was marked with a discount of 1/3 off. If the original cost of the bag was $80, how much

Arisa [49]

Answer:

around $53.33

Step-by-step explanation:

To get this you just take 80 and divide that by 3 from the one third which gets you $26.67 which is the price taken off the bag

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anzhelika [568]

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The width of a rectangle is one half its length. The perimeter of the rectangle is 54 cm. What are the width and length of the

lord [1]

Answer:

Length of rectangle = 18 cm

Width of rectangle = 9 cm

Step-by-step explanation:

Let the length of rectangle be x

$\therefore \: width \: (w) = \frac{1}{2} x \\ \\ perimeter \: of \: rectangle = 54 \: cm \\ \therefore \:2(l + w) = 54 \\ \therefore \:(l + w) = \frac{54}{2} \\ \therefore \:l + w= 27 \\ \\ \therefore \:x + \frac{1}{2} x = 27 \\ \\ \therefore \:\frac{3}{2} x = 27 \\ \\ \therefore \:x = 27 \times \frac{2}{3} \\ \\ \therefore \:x = 9 \times 2 \\ \\ \huge \red{ \boxed{\therefore \:x = 18}} \\ \\ \implies \: \frac{1}{2} x = \frac{1}{2} \times 18 = 9$

Hence

Length of rectangle = 18 cm

Width of rectangle = 9 cm

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4 years ago

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Studentka2010 [4]

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3 years ago

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A simple random sample of size n=10 is obtained from a population that is normally distributed with a mean of 40 and a standard

Eva8 [605]

Yes, the sampling distribution is normally distributed because the population is normally distributed.

A sampling distribution is a chance distribution of a statistic obtained from a larger variety of samples drawn from a specific populace. The sampling distribution of a given population is the distribution of frequencies of a variety of various outcomes that would probable occur for a statistic of a populace.

A sampling distribution is a probability distribution of a statistic this is obtained via drawing a huge variety of samples from a particular populace. Researchers use sampling distributions so that you can simplify the technique of statistical inference.

Solution :

mean = μ40

standard deviation σ σ= 3

n = 10

μx = 40

σ x = σ√n = 3/√10 = 0.9487

μ x = 4σ\x = 0.9487

σx = 0.9487

Yes, the sampling distribution is normally distributed because the population is normally distributed.

Learn more about sampling distribution here:- brainly.com/question/12892403

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2 years ago