SOLUTION: please help me ! I need help 1. If -17 is added to a number and the sum is doubleed, the result is -9 less than thee number. Find the number 2.there are two types of tickets for

Question 222201: please help me ! I need help
1. If -17 is added to a number and the sum is doubleed, the result is -9 less than thee number. Find the number
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?
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.
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!
Answer by josmiceli(19441) (Show Source): You can put this solution on YOUR website!
I can solve (4)
Let = liters of the 10% solution needed
given:
silver Iodide in 4% solution = liters
Silver Iodide in 10% solution =

3.5 liters of the 10% solution are needed
check:

OK
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