<span>A 2% solution of chlorohexidine added to 126 oz of water. The total oz 128.
Solute: chlorohexidine, 2%=0.02
solvent: water (0%)
Concentration, C, volume V
CV=c1v1+c2v1
128C=0.02*2 + 0.00*126 = 0.04
Concentration
C=0.04/128 = 0.0003125 = 0.03125%</span>
Answer:
D) 2x² + 4x - 30
Step-by-step explanation:
Follow the FOIL method:
FOIL =
First
Outside
Inside
Last
...and is the order you multiply to solve:
(x + 5)(2x - 6) =
(x)(2x) = 2x²
(x)(-6) = -6x
(5)(2x) = 10x
(5)(-6) = -30
Combine like terms. Simplify:
2x² -6x + 10x - 30 = 2x² (-6x + 10x) - 30 = 2x² + 4x - 30
2x² + 4x - 30 is your answer.
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Answer:
Step-by-step explanation:
8 1/2
or 8.5
Answer: 12 1/10 inches
Step-by-step explanation:
From the question, we are informed that Drada has a toy model of a sports car is 2 1/5 inches long and that she is making a larger model that will be 5 1/2 times the length of the smaller toy car.
The length of the larger model will therefore be:
= 2 1/5 × 5 1/2
= 11/5 × 11/2
= 121/10
= 12 1/10 inches
48.8 cm2 that is the answer I got
