bob chooses 15 downloads for $19.75, Jim chooses 40 downloads for $43.50. What is the registration fee, and what is the cost of each download?


2 Answers

Tom  Jackson Profile
Tom Jackson answered

15 downloads for $19.75 is stated this way in equation form:

15*(cost of each download) + (Registration Fee) = $19.75 or:

15*(x) + F = 19.75 or 15x + F = 19.75

In a similar way, 40 downloads for $43.50 is stated:

40(x) + F = 43.50

Where the "cost of each download"is x and where the registration fee is F and both are the same for both Bob and Jim.

Treat those two equations as a system of equations and solve for both x and F and you will get your answer.

Comment if you need more help.

(Just to give you a ball park figure, the cost per download is not over a dollar.)

2 People thanked the writer.
Virginia Lou
Virginia Lou commented
I looked at this, couldn't quite wrap around it I think it was late...
good for you...
Tom  Jackson
Tom Jackson commented
I actually did this three times before I got the right answer. The equations were immediate, but I was trying to do too much in my head and screwed up in actually substituting and solving them.
Jann Nikka Profile
Jann Nikka answered

You should work out your own answer for homework. There's a lot of examples in your math book. Try working some and you will find your answer.

1 Person thanked the writer.
Tom  Jackson
Tom Jackson commented
Never saw a math book with "hundreds" of answer to such problems.

The most I have ever seen is 42.
Jann Nikka
Jann Nikka commented
Whatever Tom 😝. I'll take the high ground and let you argue with yourself. Continue to post 😲.
Tom  Jackson
Tom Jackson commented
High ground is relative.

I'm usually looking up, but I can look down when you want me to watch you chugging along.

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