



 
Hi Camille, If a sequence is geometric then there is a number $r$ so that after the first term each term is $r$ times the previous term. In your sequence the first term is 5 and the second term is 10 so what is $r?$ Now you know $r.$ The third term is $x + 2$ and the second term is 10. What is $x?$ Penny  


Math Central is supported by the University of Regina and The Pacific Institute for the Mathematical Sciences. 