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Radda [10]
3 years ago
10

In a grocery store a $12 case of soda is labeled get a 20% discount what is the discount ? What is the sale price of the case of

soda
Mathematics
2 answers:
Ugo [173]3 years ago
8 0
20/100 times 12 = 2.40
then, 12 minus 2.40 = <em><u>9.60
~~~~~~~~~~~~~~~or~~~~~~~~~~~~~
</u></em>
<em><u /></em><u />80/100 times 12 = <em><u>9.60</u></em><em><u /></em><u />
MatroZZZ [7]3 years ago
8 0
multiply\ percent\ by\ cost\ of\ soda\\\\&#10;20\%*12=0.2*12=2.4\$\\\\&#10;sale\ price=12\$-2.4=9.6\$\\\\Sale\ price\ is\ equal\ to\ 9.6\$.
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Answer:

A.) gf(x) = 3x^2 + 12x + 9

B.) g'(x) = 2

Step-by-step explanation:

A.) The two given functions are:

f(x) = (x + 2)^2 and g(x) = 3(x - 1)

Open the bracket of the two functions

f(x) = (x + 2)^2

f(x) = x^2 + 2x + 2x + 4

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g(x) = 3(x - 1)

g(x) = 3x - 3

To find gf(x), substitute f(x) for x in g(x)

gf(x) = 3( x^2 + 4x + 4 ) - 3

gf(x) = 3x^2 + 12x + 12 - 3

gf(x) = 3x^2 + 12x + 9

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B.) To find g '(12), you must first find the inverse function of g(x) that is g'(x)

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X = 3y + 3

Make y the subject of formula

3y = x - 3

Y = x/3 - 3/3

Y = x/3 - 1

Therefore, g'(x) = x/3 - 1

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