One number is 5 times another. The sum of their reciprocals is 2/5. Determine the smaller number.

Answers

Answer 1
Answer: so x=5y
reciprocal of x=1/x then

sum of reciprocals means 1/x+1/y=2/5
subsitute x=5y for x in 1/x+1/y=2/5 and get
1/5y+1/y=2/5
multiply 1/y by 5/5 to make it 5/5y so you can add since the denomenators (bottom number) are the same

1/5y+5/5y=2/5
6/5y=2/5
multiply both sides by 5y
6=2y
divide both sides by 2
3=y
put this into x=5y so 
x=5(3)
x=15
y=3

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Answers

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Find the volume of a triangular pyramid with a base area of 24 ft2 and a height of 18 ft.144 ft3


432 ft3

Answers

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What is the slope of a line that is perpendicular to the line y=-1/3x-6OA. 3
OB. 1/3
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O D. 3​

Answers

Answer:

3

Step-by-step explanation:

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Answers

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On a scale drawing of a​ fence, 3.75 inches represent 24 feet. What is the actual length of a second fence that is 2.8 inches in the​ drawing?

Answers

The actual length of the fence is 215 inches

Step-by-step explanation:

Length of fence in drawing = 3.75 inches

Actual length of the fence = 24 ft

= 288 inches

Scale factor = 288/3.75

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Actual length = 2.8 x 76.8

= 215 inches

The actual length of the fence is 215 inches

Answer:

215 in

Step-by-step explanation:

215 in

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Answers

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