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Jamal bought a pack of 15 trading cards for $2.75. His
sister wants to buy three of those cards. How much
should Jamal sell them for? Use a double number line
to show your thinking.
a

Respuesta :

Answer: $1.65

Step-by-step explanation:

cross multiplication

if  15 cards = 2.75

     3 cards = x

15x = 2.75*3

15x = 8.25

   x = 8.25/15

   x = 0.55;  0.55x3 = 1.65; which is the cost of 3 cards

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