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5 February, 19:43

A street vendor sells two types of newspapers, one for $.25 and the other for $.40. If she sold 100 newspapers for $28.00, how many newspapers did she sell at $.25?

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  1. 5 February, 20:25
    0
    28:.25 to get 112 newspapers sold at the price of $0.25
  2. 5 February, 20:45
    0
    For this question, I had 5 options, 20,40,50,60,80. Just replace x in the following equation with one of the five answers until you get 28

    (x*0.25) + (100-x) * 0.4

    You should end up with 80*0.25+20*0.4 = 20+8

    Hard if you don't have multiple-choice selection, because you have to go through 100 guesses so you may as well make a program to calculate it for you.
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