Answer:
Georgina should add 3 liters of 49% citric acid solution.
Step-by-step explanation:
let x be the liters of 49% solution that Georgina should add. Then after she has added 0.5 liters of water, the total liters of solution she has will be
and 42% of this should be the solute:
and since adding water does not add any solvent, this amount must come from the 49% citric acid solution; therefore
Solving for 
we get:
This the amount of 49% citric acid solution Georgina must add.
148 divided by 28= 5.28
220 divided by 12= 18.33
192 divided by 15=12.80
20 divided by 3=6.66
It travels 2144 in 8 hours.
Therefore, if you want to find out how many miles it travels in one hour, divide 2144 by 8.
2144 ÷ 8 = 268 miles in one hour. :)
Answer:
Step-by-step explanation:
Slope of line passing through (x₁, y₁) and (x₂, y₂) = (y₂-y₁)/(x₂-x₁)
Slope of line passing through (9, 7) and (2, 9) = (9-7)/(2-9) = -2/7
True. <span>As the new two angles are complimentary,
the original angle is a right angle</span>
