Answer:
$15.95
Step-by-step explanation (without words):
9.57/3= 3.19
3.19*5= $15.95
Answer:
-9/28
Step-by-step explanation:
<u>Step 1: Solve</u>
-6/7 * 3/8
-18/56
-18/2 / 56/2
<em>-9/28</em>
<em />
Answer: -9/28
Let <em>q</em> be the number of quarts of pure antifreeze that needs to be added to get the desired solution.
8 quarts of 40% solution contains 0.40 × 8 = 3.2 quarts of antifreeze.
The new solution would have a total volume of 8 + <em>q</em> quarts, and it would contain a total amount of 3.2 + <em>q</em> quarts of antifreeze. You want to end up with a concentration of 60% antifreeze, which means
(3.2 + <em>q</em>) / (8 + <em>q</em>) = 0.60
Solve for <em>q</em> :
3.2 + <em>q</em> = 0.60 (8 + <em>q</em>)
3.2 + <em>q</em> = 4.8 + 0.6<em>q</em>
0.4<em>q</em> = 1.6
<em>q</em> = 4
8 * 684 = 5472
it is in between 5471 and 5473
