Let’s call the number of gallons of 30% solution “x”. If we mix together 40 gallons and x gallons of solution, we’re going to come out with a total of 40 + x gallons of that 20% solution. Mathematically, this is
40(12%) + x(30%) = (40 + x)(20%)
With the percents as decimals:
40(0.12) + x(0.3) = (40 + x)(0.2)
Simplifying, we have:
4.8 + 0.3x = 8 + 0.2x
Collecting the x terms on one side and the constants on the other:
0.1x = 3.2
And multiplying both sides by 10 to find x:
x = 32
So, you’ll need 32 gallons of 30% solution to yield 40 + 32 = 72 gallons of 20% solution.
The integer factor pairs of the first number can be written as ...
... -9 = -1×9 = -3×3 = -9×1
The sums of the factors in these factor pairs are, respectively, ...
... 8, 0, -8
The factor pair (-9, 1) meets your requirement.
X = -1, y = 5. Hope this helps
Factor is 2(13+3x)
Simplify is 26+6x
Answer:
25 Celsius es igual a 77 F, 77 es mas grande que 40 F
Step-by-step explanation:
Espero que la info. ayude
El símbolo de grado no se usa para informar la temperatura usando la escala Kelvin, sino que se indican como Kelvin. El agua hierve a 100 grados Celsius o 212 grados Fahrenheit, o 373,15 Kelvins. El agua se congela a 0 grados Celsius o 32 grados Fahrenheit, o 273,15 Kelvins. El cero absoluto es 0 Kelvin.
