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3 years ago

8

The mean age of 5 people in a room is 40 years. A person enters the room. The mean age is now 39. What is the age of the person

who entered the room?

1 answer:

IrinaVladis [17]3 years ago

6 0

Answer:

10 years old :)

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Answer:

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Step-by-step explanation:

we know that

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using a graphing tool

Plot the coordinates of rectangle to better understand the problem

see the attached figure

the formula to calculate the distance between two points is equal to

$d=\sqrt{(y2-y1)^{2}+(x2-x1)^{2}}$

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$A(-5,5),B(-1,7)$

substitute in the formula

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How do you determine if an ordered pair is a solution to a system of equations?

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Step-by-step explanation:

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