To solve a problem like this, you will need to use substitution or elimination. For the sake of an example I will solve this using substitution.
First, solve one of the equations for x or y:
3x-5y=-39
3x=-39+5y
X=(-39+5y)/3
Then substitute for the value of x in the second equation:
6x+2y=-42
6((-39+5y)/3)+2y=-42
Solve for y:
-78+10y +2y=-42
-78+12y=-42
12y=36
Y=3
Once you've solved for y, you can plug in it's value to find x:
X=-39+5(3)/3
X=-24/3
X=-8
So, we can conclude that the correct answer is B. (-8,3)
Supplementary angles add up to 180 degrees.
so if one angle is 60 degrees, then the other angle is (180 - 60) = 120
The amount of Columbian's coffee is 0.25 pounds and Kona's coffee 4.75 pounds.
Data;
- Columbian coffee = $4.40
- Kona coffee = $7.60
Let the value of Columbian coffee be represented by x
Let the value of Kona coffee be represented by y
<h3>System of Equation</h3>
To solve this problems, we need to write a system of equations of this problem.
From equation (ii), let's make x the subject of formula
Substitute equation(iii) into equation(i)
Let's substitute this value into equation(ii)
From the calculations above, the amount of Columbian's coffee is 0.25 pounds and Kona's coffee 4.75 pounds.
Learn more on system of equations here;
brainly.com/question/14323743
Answer:
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Step-by-step explanation: