Part iii
answer all 3 questions in this part. each correct answer will receive 3 credits. clearly
indicate the necessary steps, including appropriate formula substitutions, diagrams, graphs,
charts, etc. for all questions in this part, a correct numerical answer with no work shown will
receive only
credit. all answers should be written in pen, except for graphs and drawings,
which should be done in pencil. [9]
a dvd costs twice as much as a music cd. jack buys 2 dvds and 2 cds and spends $45.
determine how much one cd costs, in dollars. [only an algebraic solution can receive full credit.]