Which type of vehicle is used routinely at construction and mining sites? a. hydraulic vehicles
b. fluid system vehicles
c. passenger vehicles
d. pneumonic vehicles

x+2 because it just doubles hon so the pattern can actually tell you the expression.

so for example,

if x=2 then 2+2 is 4

if x=4 then 4+4 is 8

and so on and so forth.

i really hope that this makes sense and you out in a way hon: )