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3 years ago

One increased by 7 times a number is the same as 5 times the number plus 25

Mathematics

1 answer:

sammy [17]3 years ago

4 0

Answer:

Step-by-step explanation:

Let the number = x

7x + 1 = 5x + 25 Subtract 5x from both sides.

7x - 5x + 1 = 5x - 5x + 25 Combine

2x + 1 = 25 Subtract 1 from both sides.

2x + 1 - 1 = 25-1 Combine

2x = 24 Divide by 2

2x/2 = 24/2

x = 12

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6 is what percent of 8?

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6 is 75% of 8. 6/8 can be simplified to 3/4, which is easier to see as 75%.

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3 years ago

A shipping company charges a $6 flat fee for a package, plus a fee based on the weight of the package. The company charges $1.25

Musya8 [376]

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3 years ago

How does one find the inverse function of f(x)= <img src="https://tex.z-dn.net/?f=%5Cfrac%7B1%7D%7B3x-1%7D" id="TexFormula1" tit

lisabon 2012 [21]

Answer:

$\displaystyle f^{-1}(x)=\frac{1+x}{3x}$

Step-by-step explanation:

The Inverse of a Function

The procedure to find the inverse of the function is:

* Write the function as a two-variable equation:

$\displaystyle y=\frac{1}{3x-1}$

* Solve the equation for x.

Multiply by 3x-1

$y(3x-1)=1$

Divide by y:

$\displaystyle 3x-1=\frac{1}{y}$

Sum 1:

$\displaystyle 3x=\frac{1}{y}+1$

Operate the right side:

$\displaystyle 3x=\frac{1+y}{y}$

Divide by 3:

$\displaystyle x=\frac{1+y}{3y}$

* Swap the variables:

$\displaystyle y=\frac{1+x}{3x}$

Write back into function form:

$\boxed{\displaystyle f^{-1}(x)=\frac{1+x}{3x}}$

7 0

3 years ago

6.12 fraction equivalent

trapecia [35]

It’s 6 3/25 as a fraction

7 0

3 years ago

Read 2 more answers

This question is WORTH 15 POINTS

masha68 [24]

3x² - 33x - 180 = 0
3(x² - 11x - 60) = 0
3(x² - 15x + 4x - 60) = 0
3(x + 4)(x - 15) = 0
3(x - 4) = 0 or x - 15 = 0
3x - 12 = 0 + 15 + 15
 + 12 + 12 x = 15
 3x = 12
 3 4
 x = 3

The answer is equal to H.15 and E. 4.

8 0

3 years ago