<span>the Law of Cosines </span>b^2=a^2+c^2-2accosB
Answer:
The answer is 5 basically just cancel out the t^2’s and u get what’s left over
Step-by-step explanation:
<h3><u>Part A</u></h3>
factor the common term 'y' and '-4'
collect into groups
<h3><u>Part B</u></h3>
middle term split
factor the common term '3x' and '-2'
collect into groups
simplify the following
To solve this problem, let us first assign variables. Let
us say that:
x = volume of 67% herbicide solution
y = volume of 46% herbicide solution
The total volume should be 42 liters therefore:
x + y = 42
x = 42 – y --> 1
The component mass balance on the pure herbicide would
be:
0.67 x + 0.46 y = 0.55 (42) --> 2
Substituting equation 1 to 2:
0.67 (42 – y) + 0.46 y = 23.1
28.14 – 0.67 y + 0.46 y = 23.1
- 0.21 y = - 5.04
y = 24 L
Calculating for x using equation 1:
x = 42 – 24
x = 18 L
Therefore we only need 18 L of the 67% herbicide
solution.
Answer:
A. 18 L
