Tommy bought a total of 20 game cards some of which cost $0.25 each. Of tommy spent $4.20 to buy these cards how many cards of each type did he buy

The question is incomplete:

Tommy bought a total of 20 game cards some of which cost $0.25 each and some of which cost $0.15 each. If Tommy spent $4.20 to buy these cards,how many cards of each type did he buy?

He bought 12 cards that cost $0.25 and 8 cards that cost $0.15.

Step-by-step explanation:

From the information given, you can write the following equations:

x+y=20 (1)

0.25x+0.15y=4.20 (2)

First, you can solve for x in (1):

x=20-y (3)

Now, you can replace (3) in (2):

0.25(20-y)+0.15y=4.20

5-0.25y+0.15y=4.20

5-0.10y=4.20

5-4.20=0.10y

0.80=0.10y

y=0.80/0.10

y=8

Finally, you can replace the value of y in (3) to find x:

x=20-y

x=20-8

x=12

According to this, he bought 12 cards that cost $0.25 and 8 cards that cost $0.15.

the least common denominatore of 7 and 2 is 9

step-by-step explanation:

7+2=9

step-by-step explanation: