Jill wants to make 15 no of a 40% acid solution by mixing together a 30% acid solution and a 60% acid solution. How much of each solution must she use?
2 answers:
15 no? Don't recognize "no." I'll use "units" instead. Let f represent the volume of the 40% acid solution. Let t represent that of the 30% solution, and s that of the 60% solution. Then s + t = 15 units. Then, (15 units) - s = t 0.30t + 0.60s=(15 units)(0.40) Mult. this by 100 to elim. fractions: 30t + 60s = 600 Subst (15 units - s) for t, 30 (15-s) + 60s = 600 4500 - 30s + 60s = 600 30s = 150 s = 5 units Then t = (15 units - 5 units) = 10 units. Use 10 units of the 30% solution and 5 units of the 60% solution. Check: Does (10)(.3) + (5)(.6) = (15)(.4)? Yes <span />
X+y=15 0.3x+0.6y=0.4*15=6 solve the system of equation. Multiply equation one by 0.3: 0.3x+0.3y=4.5 subtract the new from the second equation: 0.3y=1.5 y=5 x=10
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Answer:
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Answer:
<h2>7a-12</h2>
Step-by-step explanation:
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