Short i makes the /i/ sound. Like:
igloo inchworm
insect
Here are some words with the short i vowel:
hit fit sick hip mix
fin Rick sit pick lip
X at the end of a word makes the /ks/ Sound. Like…
mix fox
Here are some words with final x:
mix fix fox box six
Wax tax
ip
As in lip
it
As in hit
ick
As in stick
ix
As in mix