A number is thrice another number. The sum of their reciprocals is 4. Find the numbers.

One number is three times as large as another. The sum of their reciprocals is 4/3 (fraction). Find the two numbers.

Quote:

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A number is thrice another number.

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So:

x = 3y

Quote:

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The sum of their reciprocals is 4. Find the numbers.

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So:

1/x + 1/y = 4

Substitue x for 3y

1/3y + 1/y = 4

etc...

Therefore the numbers are 1 and 1/3

a.$25 b.$400 c.$2500 d.$40,000

5 = 3
9 w use cross products.
5 =3 Divide both sides by 5
9 w
5(w)=9(3)
5w=27
5 5
w=27
5

on the map,the distance two sets of measurements,such as 1 in:5 mi.a scale drawing or scale model uses a scale to represent an object as smaller or larger than the actual object.a map is an example of a scale drawing...

map - 1 in.
actual 18 mi. write the scale as a fration.
1 0.625 let x be the actual distance.
18 x
x.1=18(0.625) use cross products to slove.
x=11.25

similar,
figures have exacly the same shape but not necessarity the same size.


If we make a diagram and label it as such, perhaps we can make use of some similar triangles.

DC=180, AB=120, BE=20, BC=2.5, DG=60, FH=x-120



Solve for x.


If we make a diagram and label it as such, perhaps we can make use of some similar triangles.

DC=180, AB=120, BE=20, BC=2.5, DG=60, FH=x-120
60 =-120
2.5 20


Solve for x.

What do you mean by this? Is that a question? If so, create your own thread. If that's an answer, I don't see how it can help the original asker.