What does the constant 2.2 in L(D) represent

For the following geometric sequence, find the recursive formula. {-80, 20, -5, } i need : ')

You and a friend went to the movies.you spent half your money on tickets. then you spent 1/4 of the money on popcorn, $2 on candy, and $3 on a soda. if you have $1 left, hiw much money did u take to the movies?

Solve the equation.then check your solution 8=1.88+a