Answer:
The chart describes how four of Susan’s friends handle their money. Handling Money Person Description of Spending Sylvia She use
s her whole paycheck to buy food and necessities and pay the minimum amount on her bills each month. Then, she buys new clothes and pays for them with a credit card. Nancy She uses her whole paycheck to buy food and necessities and then takes a trip each month, which she pays for by adding to a personal loan with her credit union. Fiona She buys food and necessities and pays more than the minimum due on her bills each month. She goes out with her friends using some of the money that is left over in her checking account. Uli She buys food and necessities and pays the minimum amount on her bills each month. She goes out with her friends using the money that is left over in her savings. Which person is most creditworthy? Nancy Sylvia Fiona Uli
2 answers:
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<u>ANSWER: </u>
110ML of 35% acid solution must be mixed with 10ML of 95% solution to obtain 120ML of 40% solution.
<u>SOLUTION: </u>
First, set up table. fill in the unknowns with variables x and y. The table is attached below.
From the table shown below, we can easily set up the two equations.
Sum of values of two acids = Value of mixture
0.35x + 0.95y = 48
For convenience, we will multiply the entire equation by 100,
35 x + 95y = 4800 ------ (1)
Now, Sum of amounts of each acid = Amount of mixture
x + y = 120 --------- (2)
Multiply eqn 2 with 35 for easy calculation and derive the equation into one variable.
35 = 35x + 35y = 4200
Subtracting equation (2) from (1), we get
0 + 60y = 600
Thus, 60y = 600
Substituting y = 10 in (2),
35x + 35(10) = 4200
35x + 350 = 4200
35x = 4200 - 350
35x = 3850
So, we have x = 110 and y = 10
We can conclude that 110ML of 35% acid solution must be mixed with 10ML of 95% solution to obtain 120 ML of 40% solution.
