Answer:
18 ounces of the 25% solution
21 ounces of the 38% solution
Step-by-step explanation:
let a be the ounces of 25% alcohol solution
let b be the ounces of 38% alcohol solution
a + b = 39
0.25a + 0.38b = 0.32(39) = 12.48
Rearrange a + b = 39:
a = 39 - b
Now we can substitute a = 39 - b into the other equation
0.25a + 0.38b = 12.48
0.25(39 - b) + 0.38b = 12.48
Simplify by distributing
9.75 - 0.25b + 0.38b = 12.48
Collect like terms
9.75 + 0.13b = 12.48
Isolate b to solve
0.13b = 2.73
b = 2.73/0.13
b = 21
Sub b = 21 into an equation to find "a"
a + b = 39
a + 21 = 39
a = 39 - 21
a = 18
Therefore we need 18 ounces of the 25% solution and 21 ounces of the 38% solution.
Answer:
55
Step-by-step explanation:
20-9 = 11 then 5x11=55
Answer:
12/15
Step-by-step explanation:
To find the answer to this question, we first need to align the numerators and find what multiplies by 4 to get 12.
This is achieved by dividing 12 by 4.
12 / 4 = 3
Now, we need to multiply 3 by the denominator (5) to get the missing denominator of the second fraction.
5 * 3 = 15 --> (Denominator)
Inputting the denominator into the second fraction, we have the fraction:
12/15
Answer:
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Step-by-step explanation:
