Answer:
You would have to insert 5 for there to be infinite solutions.
5
Step-by-step explanation:
10c+15=5(2c+3)
use distributive property
10c+15=10c+15
Hope this helps!
If not, I am sorry.
2 triangles ?
sorry if i got this wrong, when you cut it through the middle connecting the ends it give you two triangles?