Respuesta :
Answer:
ets Price of a DVD is fixed i.e. 15
and One CD price is 5 (Not fixed)
In First situation
2 DVDs and 1 CD cost = 35 as given
2 x 15 + 5 = 35
Lets one CD price is 7.5
In Second situation
2 x 15 + 2 x 7.5 = 45
Its mean CD price may be between 5 to 7.5
In asked scenario, Martin has 50
1 DVD and 3 CDs?
1 x 15 + 3 x 7.5 = 37.5
37.5 is lesser than 50
Step-by-step explanation:
Answer:
CD = $9
DVD = $13
Step-by-step explanation:
CD+DVD = 22
DVD = CD+4
substitute for DVD
CD +(CD+4) = 22
2CD+4 = 22
2CD = 18
CD = 9
DVD = 13