what is the independent and dependent variable for “ gillian is playing video games at an arcade. gillian starts with $40 and is playing games that cost 50 cents per game.”

Sanderson is having trouble with his assignment. his shown work is as follows: − 3 7 7 3 = − 3 7 × 7 3 = − 21 21 = −1 however, his answer does not match the answer that his teacher gives him. complete the description of sanderson's mistake. find the correct answer.