B- $3.00
19/1.14 = .06
.06 x 50 = $3.00
Answer:
The answer to your question is 17, -5, 10
Step-by-step explanation:
Coefficients are the numbers that come before a variable (letter) like x, y or z.
In your question
17 is the coefficient of 17x
-5 is the coefficient of -5y
10 is the coefficient of 10z
In this problem, there are 3 variables and then there are 3 coefficients.
Total = 36oz
Amount of 18% solution = x
Amount of 9% solution = 36 - x
Using the fact that (amount of solution) * (percent HCl) = amount HCl we can set up an expression for the amount HCl in a mixture of 18% and 9% solutions with a total volume of 36oz.
Amount of HCl = x*0.18 + (36 - x)*0.09
If we divide this by the amount of solution we get percent HCl, and we have a target of 10% HCl. Now we have an equation to solve,
[x*0.18 + (36 - x)*0.09]/36 = 0.1
x*0.09 + 3.24 = 3.6
.09x = 0.36
x = 4
Therefore,
4 ounces of 18% HCl solution and 32 ounces of 9% HCl solution
Check:
[(4*.18) + (.09*32)]/36 = 0.1?
0.1 = 0.1 Yes.
Step-by-step explanation:
w = 3(2a + b) - 4
w = 6a + 3b - 4
6a = w - 3b + 4
a = 1/6 * (w - 3b + 4).
You can do 15-5=10 and then you have 3 left to subtract. Which means 10-3=7
