What is the lcm of 16 and 40 ? 24 and 40 ?

Keisha makes a large sandwich for a family picnic she takes 1/2 of them the sandwich to the picnic her family eats 3/8 of the whole sandwich what fraction of the whole sandwich does keisha bring back from the picnic

How do i get my dad to stop making me gargle his pickle i want my mom to gargle my pickle not my dads

If f(x)=3x+1 and f^-1=x-1/3, then f^-1(7)=