document.write( "Question 178269: following the guidelines of the Food and Drug Administration, Dale tries to eat at least 5 servings of fruit each day. For the first six days of one week, she had 5,5,3,5,4, and 5 servings. How many servings of fruit should Dale eat on Saturday to average at least 5 servings per day for the week? \n" ); document.write( "

Algebra.Com's Answer #133230 by EMStelley(208) $\"\"$ $\"About$

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Well, first a good question to ask might be what is the average so far? That would be
\n" ); document.write( " $\"%285%2B5%2B3%2B5%2B4%2B5%29%2F6=27%2F6=4.5\"$
\n" ); document.write( "So, so far he has averaged 4.5 servings of fruit a day. So we need to up it to 5. Let's call the number of servings of fruit he needs to eat on the last day x. Then we want
\n" ); document.write( " $\"%285%2B5%2B3%2B5%2B4%2B5%2Bx%29%2F7=5\"$
\n" ); document.write( "Note that since we want the average to be at least 5, solving the equation equal to 5 will tell us the minimum number of servings he needs to eat. So the first step would be to multiply both sides by 7.
\n" ); document.write( " $\"5%2B5%2B3%2B5%2B4%2B5%2Bx=35\"$
\n" ); document.write( "Now, we combine like terms on the left hand side:
\n" ); document.write( " $\"27%2Bx=35\"$
\n" ); document.write( "Last, subtract 27 from both sides
\n" ); document.write( " $\"x=8\"$
\n" ); document.write( "So he needs to eat at least 8 servings of fruit on the last day to average 5 for the week. \n" ); document.write( "

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