Systems do inequalities word problems

Determine the next term in the sequence. then write the next 2 terms 4,16,28, what number do you do to get that?

Pelle's sister is three years older than pelle the father is 5 times as old as pelle the mother was 28 when the sister was born altogether they are 98 years old how old is pelle?

How much orange juice do you need to make 2 servings of lemony orange slush?