7 L of one solution is mixed with 3 L of another, making a new solution with a total volume of 10 L and concentration 29%. This means the new solution contains
(10 L) * 29% = (10 L) * 0.29 = 2.9 L
of acid.
Let the concentration of the first solution be <em>c</em>%. Each liter of the 15% acid solution contributes 0.15 L, and each liter of the solution of unknown concentration contributes 0.01<em>c</em> L of acid. To end up with a total of 2.9 L of acid, we would get
7 * (0.01<em>c</em> L) + 3 * (0.15 L) = 2.9 L
Solve for <em>c</em> (we can omit the units):
0.07<em>c</em> + 0.45 = 2.9
0.07<em>c</em> = 2.45
<em>c</em> = 35
So the first solution has a concentration of 35%.
The ordered pair of the solution is (6, -3)
Answer:
<h2>1710</h2>
Step-by-step explanation:
I think it's 19/20 from 1800.
<h2>19/20 *1800=19*90=
1710</h2>
"The length is 6 meters longer than the width" means l = 6 + w.
Using the perimeter formula, we have
Then,
<h2>Hence, the width is 25.5 meters.</h2>
Answer: isolate the exponent term on one side of the equation, and then apply the appropriate radical to both sides of the equation.
Step-by-step explanation:
