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photoshop1234 [79]

3 years ago

14

Andrea has averaged the ages of 12 people in her class, and the mean is 16 years old. She removes one person from the data set a

nd the mean becomes 15 years old. Which age was removed from the data set?
a.) 15
b.) 16
c.) 27
d.) 28

2 answers:

belka [17]3 years ago

6 0

Answer:

The answer is C)27

Step-by-step explanation:

fredd [130]3 years ago

5 0

C.)27 I think that’s the answer

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bearhunter [10]

Answer:

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Step-by-step explanation:

Side a

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Area

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4 years ago

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In England, mass is measured in units called stones. One pound equals 1/14 of stone. A cat has a mass of 3/4 stone. What is it's

kogti [31]

1 pound = 1/14 stone
[multiply by 14]
14 pounds = 1 stone
[multiply by 3]
42 pounds = 3 stone
[divide by 4]
42 / 4 pounds = 3/4 stone
[simplify]
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5 0

3 years ago

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Tomtit [17]

Answer:

$-3x^{3} -9x^2+3$

Step-by-step explanation:

Given

$(5x^{3} -7x^{2} +3x-4)-(8x ^ { 3 } +2x ^ { 2 } +3x-7) }$

Required

Simplify

$(5x^{3} -7x^{2} +3x-4)-(8x ^ { 3 } +2x ^ { 2 } +3x-7) }$

Open brackets

$5x^{3} -7x^{2} +3x-4-8x^3 -2x^2 -3x+7$

Collect Like Terms

$-8x^3+5x^{3} -7x^{2} -2x^2+3x -3x-4+7$

Simplify like terms

$-3x^{3} -9x^2+3$

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3 years ago

Send answers I will check if correct

Vikentia [17]

Step-by-step explanation:

x = n of years of mary

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3 years ago

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Answer:

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3 years ago

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