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 Post subject: Math Essentials Word Problem page123 question 7Posted: Thu Oct 21, 2010 8:31 pm

Joined: Thu Oct 21, 2010 5:19 am
Posts: 16
Dear VP helper,

"7.Mario saved more than \$30 when buying his TV at a 15% discount.what is the least expensive price that the TV could have cost before the discount?"

the given key of the book is followed:

"Mario's savings,15% off of the retail price,are more than \$30.We can write this mathematically as:
15% of retail> 30
15/100 R >30
...
R>200"

I thought the answer is
15% off of the retail >30
85% of retail >30
85% R >30
R>600/17
R>35

Am I miss something? What do you think of this question?

Thanks,have a nice day!

Cathy

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 Post subject: Re: Math Essentials Word Problem page123 question 7Posted: Fri Oct 22, 2010 5:11 pm

Joined: Thu Feb 12, 2009 6:32 pm
Posts: 497
The way you're solving it would be right if they phrased it "Mario SPENT more than \$30 on his TV with a 15% discount."
Since we're calculating the amount of the discount, rather than the final cost of the TV, we don't look at the 85% number.

Make sense?

Veritas Help

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 Post subject: Re: Math Essentials Word Problem page123 question 7Posted: Fri Oct 22, 2010 10:47 pm

Joined: Thu Oct 21, 2010 5:19 am
Posts: 16
Get it. To the point, and very impressive! Thanks!

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