Answer:
D the last one
Step-by-step explanation:
Below are the choices:
A. 80 mL of the 3.5% solution and 120 mL of the 6% solution
<span>B. 120 mL of the 3.5% solution and 80 mL of the 6% solution </span>
<span>C. 140 mL of the 3.5% solution and 60 mL of the 6% solution </span>
<span>D. 120 mL of the 3.5% solution and 80 mL of the 6% solution
</span>
Let fraction of 3.5% in final solution be p.
<span>p * 3.5 + (1 - p) * 6 = 4.5 </span>
<span>3.5p + 6 - 6p = 4.5 </span>
<span>2.5p = 1.5 </span>
<span>p = 3/5 </span>
<span>3/5 * 200 = 120 </span>
<span>Therefore the answer is B. 120 ml of 3.5% and 80 ml of 6%.</span>
Answer:
85.714...
Step-by-step explanation:
Convert into a fraction, then divide fraction (ratio) 48 / 56 Answer: 85.714285714286%
Answer:
When dividing by 1000, move the decimal point three places to the left (the last one)
Step-by-step explanation:
Answer:
(x+4)(x-3)
Step-by-step explanation:
I'm italian. I used a formula that we Italians call "somma e prodotto". Tell me if it's correct.
