48 cookies; 25 % decrease... Find the new amount given the original amount And the percent of change.

1 answer:

7 0

48 cookies after 25 % decrease is as much as 75 % from 48:

75% from 48 =
= 75/100 * 48 =
= 3/4 * 48 =
= 3/1 * 12 =
= 3 * 12 =
= 36

I hope it will help you :)

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What’s the inverse of the function f(x) = 2x - 10

erastovalidia [21]

The answer is: " f ⁻¹(x) = $\frac{x}{2}$ + 5 " .
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Explanation:
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Given the function: " f(x) = 2x − 10 " ; Find the "inverse function" .

Let "f(x)" be represented by "y" ; and rewrite:

y = 2x − 10 ;

Change the "y" to an "x" ; and change to "x" to a "y" ; as follows:
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x = 2y − 10 ;

Now, rewrite this equation, in "slope-intercept form"; that is; "y = mx + b" ;

To do this, start by solving THIS equation for "y"; in terms of "x" ; with "y" as an "isolated variable" on the "left-hand side" of the equation;
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We have:
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" x = 2y − 10 " ;

Add "10" to each side of the equation; as follows:

x + 10 = 2y − 10 + 10 ;

to get:

x + 10 = 2y ;

↔ 2y = x + 10 ;

Now, divide each side of the equation by "2" ;
to isolate "y" on one side of the equation (as a single variable);
& to solve for "y" ;

→ 2y / 2 = (x + 10) / 2 ;

to get:

→ y = (x/2) + (10/2) ;

→ y = (x/2) + 5 ;

Now, rewrite the equation, by substituting: " f ⁻¹(x) " ; in place of the "y" ; to indicate that this function is an "inverse function; as follows:

→ " f ⁻¹(x) = $\frac{x}{2}$ + 5 " .
______________________________________________________

The answer is: " f ⁻¹(x) = $\frac{x}{2}$ + 5 " .
_______________________________________________________

8 0

3 years ago

Read 2 more answers

Figure on the right shows line A is parallel to line B and line C intersects lines A and B to form 8 angles Wich two angles are

Fed [463]

Answer:

B. 

Step-by-step explanation:

We answer that before thank you

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For the given function f(x)equals2.8xplus4.4, x is the number of years since 2000 and y (or f(x)) is the percent of students