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Julli [10]
3 years ago
12

raisa recevice a 9% commission on all items that she sales. her commision for her sales last week was 121.50. what was the dolla

r value of her sale last week.
Mathematics
2 answers:
Charra [1.4K]3 years ago
4 0
$1350 is your answer XDDDDDDDDDDD
Ilia_Sergeevich [38]3 years ago
3 0
$1350 as 9%= 121.50
1%= 121.50 / 9 =13.5
100%= 13.5 x 100 = $1350
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Given a triangle with side lengths 4.1 and 1.3, what is the range of possible sizes for x
zimovet [89]

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The function of f(x) = 3x + 2 has a domain of -3 &lt; x &lt; 5. What is the domain of f-1(x)?
Flura [38]
<h3>Answer:    -7 < x < 17</h3>

====================================================

Explanation:

Plug in the lower bound of the domain, which is x = -3

f(x) = 3x+2

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f(-3) = -9+2

f(-3) = -7

If x = -3, then the output is y = -7. Since f(x) is an increasing function (due to the positive slope), we know that y = -7 is the lower bound of the range.

If you plugged in x = 5, you should find that f(5) = 17 making this the upper bound of the range.

The range of f(x) is -7 < y < 17

Recall that the domain and range swap places when going from the original function f(x) to the inverse f^{-1}(x)

This swap happens because how x and y change places when determining the inverse itself. In other words, you go from y = 3x+2 to x = 3y+2. Solving for y gets us y = (x-2)/3 which is the inverse.

-----------------------

In short, we found the range of f(x) is -7 < y < 17.

That means the domain of the inverse is -7 < x < 17 since the domain and range swap roles when going from original to inverse.

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