Aproblem states: "there are 9 more children than parents in a room. there are 25 people in the room in all. how many children are there in the room? "
let c represent the number of children.
which expression represents the number of parents?

let x be the money she spent so that she can earn the free t-shirt.

since, she already spent $112.49

⇒

also, as per the statement: jennifer must spend $250 or more in order to qualify for a free t-shirt at the store.

then,

we have an inequality i.,e

subtract 112.49 from both sides we get;

therefore, $137. 51 more money does jennifer need to spend so that she can earn the free t-shirt