The number of dimes is 3 more than twice the number if nickels.The total value of the coins is $7.05.How many of each type of co
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Answer:
Step-by-step explanation:
Given that a solution containing 12% alcohol is to be mixed with a solution containing 4% alcohol to make 20 gallons of solution containing 9% alcohol.
Let x gallons of 12% alcohol be mixed with y gallons of 4% alcohol.
Total gallons
Alcohol content in the total mixture
b) Two equations are
c) This is of the form Ax = B
where A =
Inverse is
Solution set is A inverse *B
=