Answer:
The total number of bugs in the collection is 36
Step-by-step explanation:
Let
x -----> the number of bugs that you find out
y ----> the number of bugs that the classmate find out
we know that
[tex]\frac{x}{y+x} =\frac{5}{9}[/tex] -----> equation A
[tex]x=y+4[/tex] ----> equation B
Solve the system by graphing
Remember that the solution is the intersection point both graphs
The solution is the point (20,16)
The total number of bugs in the collection is
[tex](20+16)=36\ bugs[/tex]