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2 years ago

13

The mean age of 5 people in a room is 36 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:

____ [38]2 years ago

7 0

Your answer is 36.5. Hope this helps!

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In a scale drawing, a building has a length of 15 cm. The actual length of the building is 37.5 feet. Whats the scale of the dra

Feliz [49]

Answer:

$\frac{15}{37.5}\ \frac{cm}{ft}$

or

$1.31:100$

Step-by-step explanation:

we know that

The scale of the drawing is equal to divide the length of a building in the scale drawing by the actual length of a building

so

$\frac{15}{37.5}\ \frac{cm}{ft}$

That means

15 cm in the drawing represent 37.5 ft in the actual

Remember that

$1\ ft=30.48\ cm$

Convert 15 cm to ft

divide by 30.48

$15\ cm=15/30.48\ ft$

substitute

$\frac{15}{37.5}\ \frac{cm}{ft}=\frac{(15/30.48)}{37.5}=\frac{0.0131}{1}$

or

$1.31:100$

That means

1.31 units in the drawing represent 100 units in the actual

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likoan [24]

Answer:

20 trail markers

Step-by-step explanation: I would appreciate a brainiiest

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hodyreva [135]

Answer:

Rectangle.

Round.

Arched.

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ΔABC has three sides with these lengths: AB = 9, BC = 40, and CA = 41. What is the value of cos C?

kotykmax [81]

Answer:

$cos(C) =\frac{40}{41}\\\\cos(C)=0.976$

Step-by-step explanation:

To find the $cos (C)$ we must use the cosine theorem.

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$9^2- 40^2- 41^2 =-2(40)*(41)cos(C)$

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