Answer:
The equation 5x + y = 0 represents a direct variation
The constant of variation is k=-5
Step-by-step explanation:
We need to tell if the equation 5x+y=0 represents a direction variation or not.
The equation for direct variation is: 
where k is constant of variation.
In the given equation:
Comparing it with general equation for direct variation we get 
so equation represents direct variation.
Value of k is -5
So, the constant of variation is k=-5
Answer:
Option A. 36
Step-by-step explanation:
Let
x-------> the number of boys
y------> the number of girls
we know that
-----> equation A
-----> equation B
using a graphing tool to solve the system of equations
Remember that the solution is the intersection point both graphs
The solution is the point (36,6)
see the attached figure
therefore
The number of boys is 36
Answer:
88% of the cupcakes sold were chocolate :)
I'm not at my desk and can't check it out right now.
But I think you should try 10 and -42 .
