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4) Good Work Company charges by the word to run classified ads. This company charges $12 for
the first 15 words and $0.55 for each additional word.
a. How much would a 25-word classified ad cost?
b. How much would a 50-word classified ad cost?

Sagot :

Equation::

  • Rate of change=0.55$

If words be x

Equation in slope intercept form

  • y=12+0.55x, x≥15

So

#1

More words=25-15=10

Cost:-

  • y=12+0.55(10)=12+5.5=17.5$

#2

Extra words=50-15=35

Cost:-

  • y=12+0.55(35)=12+19.25=29.25$
mathstudent55

Answer:

a. $17.50

b. $31.25

Step-by-step explanation:

a.

For $12 you get 15 words.

For a 25-word ad, you need 10 more words than the 15 you get for $12, so you must add 10 words at $0.55 per word.

cost = $12 + 10 × $0.55

cost = $12 + $5.5

cost = $17.50

b.

50 words is 25 words more than 25 words, so you must pay for 25 words more than the cost of the 25-word ad in part a.

cost = $17.50 + 25 × $0.55

cost = $17.50 + $13.75

cost = $31.25

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