Answer:
37.34 or 37 if rounded
Step-by-step explanation:
Write the equation vertically to make it easier. 8 minus 4 equals 4, 5 minus 2 equals 3, 9 minus 2 equals 7, and 6 minus 3 equals 3.
15 gallons of 35% peroxide solution contains 0.35 × 15 = 5.25 gallons of hydrogen peroxide. The rest of the volume is made up of 15 - 5.25 = 9.75 gallons of water.
If we add 
gallons of water to the solution, the amount of hyrdrogen peroxide in the solution stays the same, but the volume of water increases to 
gallons, and the total volume increases to 
gallons.
To get a concentration of 8% in this diluted solution, we add gallons of water such that
Solve for .
To get the desired concentration, one must add 50.625 gallons of water, and one will end up with a total volume of 65.625 gallons of solution.
The inequality would be written out as x is less than or equal to five, so the answer is B
Answer: the plain pencil costs 10 cents and the colored pencil costs 20 cents
