I NEED HELP WITH THIS OTHER QUESTION 1/2 + 2 3/4=?

Mp model with mathematics explain how the number of text messages dario sent and the cost form an arithmetic sequence.then write an expression to find dario's text messaging bill if he sends n text messages over 250.

If f(x) =3x-2 and g(x) =2x+1 fins (f+ g) (x)

Rhombus adef is inscribed into a triangle abc so that they share angle a and the vertex e lies on the side bc . what is the length of the side of the rhombus if ab=c, and ac=b.