Please hurry i need this done asap

Me what is the value of x? showing work would be appreciated - ! : )

The first five terms of a linear sequence are given below. 7 , 12 , 17, 22 , 27 , what is the next term of the sequence?

For f(x)=2x+3 and g(x)=x^2- 8 find (f+g) (x)