Answer:
80
Step-by-step explanation:
Insert the values or x and y into the expression.
=
= 80
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.
Since you know the value of x, you can substitute/plug it into the equation to find the value of y:
y = 2x + 5 Plug in 1 into "x" since x = 1
y = 2(1) + 5
y = 7
When x = 1, y = 7 --> (x, y) = (1, 7) Your answer is #4
This is pretty simple. 72 x 13 = 936
Therefor Val ran 936 meters.
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I hope this helps
It’s 60000
Since 2000000 divided by 3% equals 6.666,666 take the six at the beginning and add four zeros