document.write( "Question 222201: please help me ! I need help
\n" ); document.write( "1. If -17 is added to a number and the sum is doubleed, the result is -9 less than thee number. Find the number
\n" ); document.write( "2.there are two types of tickets for a school play. student tickets and tickets for the general public. The total cost for one student ticket and one general public ticket is $8.00. the total cost for 11 student ticket and 14 general public tickets is $106> how much does a student ticket cost?
\n" ); document.write( "3.tim invested $84000 in two plans. Plan 1 is at an APR of 5% and plan 2 is at an APR of 10%. If he invested $5000less in plan 2 than in plan 1, how much can he expect to earn in one year.
\n" ); document.write( "4.In a chemistry class, 7 liter of 4% silver iodide solution must be mixed with a 10% solution to get 6% solution. How many liters of the 10% solution are needed? help!
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Algebra.Com's Answer #166432 by josmiceli(19441)\"\" \"About 
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I can solve (4)
\n" ); document.write( "Let \"x\" = liters of the 10% solution needed
\n" ); document.write( "given:
\n" ); document.write( "silver Iodide in 4% solution = \".04%2A7+=+.28\" liters
\n" ); document.write( "Silver Iodide in 10% solution = \".1x\"
\n" ); document.write( "\"%28.28+%2B+.1x%29%2F%287+%2B+x%29+=+.06\"
\n" ); document.write( "\".28+%2B+.1x+=+.06%2A%287+%2B+x%29\"
\n" ); document.write( "\".28+%2B+.1x+=+.42+%2B+.06x\"
\n" ); document.write( "\".04x+=+.14\"
\n" ); document.write( "\"x+=+3.5\"
\n" ); document.write( "3.5 liters of the 10% solution are needed
\n" ); document.write( "check:
\n" ); document.write( "\"%28.28+%2B+.1x%29%2F%287+%2B+x%29+=+.06\"
\n" ); document.write( "\"%28.28+%2B+.1%2A3.5%29%2F%287+%2B+3.5%29+=+.06\"
\n" ); document.write( "\"%28.28+%2B+.35%29%2F+10.5+=+.06\"
\n" ); document.write( "\".63%2F10.5+=+.06\"
\n" ); document.write( "\".63+=+.06%2A10.5\"
\n" ); document.write( "\".63+=+.63\"
\n" ); document.write( "OK
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