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2 years ago

to increase the mean of 4 numbers by 2, by how much would the sum of the 4 numbers have to increase? check image.

Mathematics

1 answer:

solong [7]2 years ago

8 0

Answer:

Step-by-step explanation:

x=average

(x+x+x+x)/4=average

to increase x by 2 you add 2

x+2=average

(x+2+x+2+x+2+x+2)=4=(4x+8)/4=x+2

you'd have to increase the sum by 8 to make the numbers' averages' go up by 2

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natima [27]

Answer:

Step-by-step explanation:

Total sales:

Brian:

July, 38.9; August, 35.9, September, 40.5; October, 36.1

= $151,400

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July, 41.1; August, 36.8, September, 39.2; October, 43.3

= $160,400

Miguel:

July, 40.1; August, 44.1, September, 43.3; October, 39.7

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Wanda:

July, 41.2; August, 36.5, September, 43.2; October, 39.3

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3 years ago

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Tomtit [17]

Answer:

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Step-by-step explanation:

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3 years ago

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shutvik [7]

Answer:

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Step-by-step explanation:

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3 years ago

A new experimental strain of pepper plants was being studied to estimate how much fruit one plant would produce in a typical gro

zmey [24]

Answer:

58.9% produced produced peppers weighing between 13 and 16 pounds.

Step-by-step explanation:

We are given the following information in the question:

Mean, μ = 15

Standard Deviation, σ = 1.75

We are given that the distribution of weight of peppers is a bell shaped distribution that is a normal distribution.

Formula:

$z_{score} = \displaystyle\frac{x-\mu}{\sigma}$

P(peppers weighing between 13 and 16 pounds)

$P(13 \leq x \leq 16) = P(\displaystyle\frac{13 - 15}{1.75} \leq z \leq \displaystyle\frac{16-15}{1.75}) = P(-1.142\leq z \leq 0.571)\\\\= P(z \leq 0.571) - P(z < -1.142)\\= 0.716 - 0.127 = 0.589 = 58.9\%$

$P(13 \leq x \leq 16) = 58.9\%$

58.9% produced produced peppers weighing between 13 and 16 pounds.

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3 years ago

Which two integers are 7 units away from the number 0 an a number line ?

Anarel [89]

4. The answer is -7 and 7. Start at 0 and count to the left. That’s -7. Then to the right it’s 7

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3 years ago

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