Let A and B be the mL of each solution needed.
quantity equation
A + B = 360
concentration equation
0.5A + 0.6B = 0.53(360)
use A = 360 - B for substitution in the other equation.
0.5(360 - B) + 0.6B = 190.8
180 - 0.5B + 0.6B = 190.8
180 + 0.1B = 190.8
0.1B = 190.8 - 180
0.1B = 10.8
B = 10.8/0.1
B = 108 mL
then A+B = 360
A + 108 = 360
A = 360 - 108
A = 252 mL
Answer:
Work out the Mean (the simple average of the numbers)
Then for each number: subtract the Mean and square the result.
Then work out the mean of those squared differences.
Take the square root of that, and that would be the answer.
I think y is 2 because x is -1 right?
Answer:
1 or 9.
Step-by-step explanation:
A coefficient is "a numerical or constant quantity placed before and multiplying the variable in an algebraic expression (e.g. 4 in 4xy)".
So, in this case, the coefficient of 9x would be 9.
The coefficient of x^2 would be 1.
Hope this helps!
