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noname [10]
4 years ago
8

The sum of two positive numbers is 5 times their difference. What is the ratio of the larger number to the smaller number?

Mathematics
1 answer:
Anna11 [10]4 years ago
4 0
Let the two numbers be x and y

x + y = 5(x-y)
x + y = 5x -5y
6y = 4x
x= (6/4)y
x= (3/2)y

there the ratio is 3/2
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If f(x)=5x+a and f-1(10)=-1, find a
zhenek [66]

Answer:

15

Step-by-step explanation:

Given the function

f(x)=5x+a

and f^{-1} (10)=-1(f^{-1} \text{is the inverse function of f})

let f(x)=y

Substitute in f(x)

y=5x+a\\y-a=5x\\x=\frac{y-a}{5}

From the definition inverse function

if f(x)=y    ⇒   f^{-1} (y)=x

Substitute this in the above expression

f^{-1} (y)=\frac{y-a}{5}

Substitute y=10

⇒

f^{-1} (10)=\frac{10-a}{5}\\-1=\frac{10-a}{5}\\-5=10-a\\a=10+5\\a=15

Therefore a=15

4 0
3 years ago
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devlian [24]

Answer:

1

Step-by-step explanation:

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3 0
3 years ago
The right rectangular prism is packed with unit cubes of the appropriate unit fraction edge length find the volume of the right
evablogger [386]

Answer:

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Step-by-step explanation:

5 0
3 years ago
What is solution of 8x-2y =1 and -4x+y = 3
Maksim231197 [3]

Answer: it has no solution

Step-by-step explanation:

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substitute equation 3 into equation 1 .

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6 0
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iVinArrow [24]
Answer is choice C) cosine is even; sine is odd

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4 0
3 years ago
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