How many quarts of pure antifreeze must be added to 5 quarts of a 20% antifreeze solution to obtain a 30% antifreeze solution
?
1 answer:
Answer:
5/7 quart
Step-by-step explanation:
Amount = concentration × volume
Amounts added = final amount
100% × x + 20% × 5 = 30% × (x+5)
Solving for x:
1.00x + 0.2×5 = 0.3×(x+5)
x + 1 = 0.3x + 1.5
0.7x = 0.5
x = 5/7
x ≈ 0.7
You should add 5/7 quart of pure antifreeze, or about 0.7 quart.
You might be interested in
A = 90 degrees
B = 50 degrees
D = 140 degrees
E = 40 degrees
HOPE THIS HELPS!
Answer:
76 degrees
180-38-38 is 104
180-104 is 76 since it's a straight line which equals to 180 degrees
56m^2
see the steps from the pic
The equivalent of 4 meters is 4.374 yards
