I don’t understand how I would know if it is a triangle just using lengths. Can someone please help?

I believe it’s E (May be more idk)

(There are many types of triangles so idk which kind you kind of talking about but most likely it’s E.) (May be incorrect but I’m sorry if it is)

I hoped this helped you

problem:

f(x) = - 2/3x + 5; f(5/2)

substitute 5/2 in for x:

f(5/2) = -2/3(5/2) + 5

simplify the right side:

f(5/2) = -5/3 + 5

f(5/2) = 10/3

f(5/2) = 10/3

i hope this !

take it another