You have a frame that holds three pictures. you pulled out your favorite five photos. how many sets of three are there?
make a list of all the possible combinations using the numbers 1 - 5 to represent the photos.

1, 2, 3

1, 2, 4

1, 2, 5

1, 3, 4

1, 3, 5

1, 4, 5

Step-by-step explanation:

These are all possible combinations, and since order doesn't matter, there are only 6 combinations that can be used for the frame.

1,2,3

1,2,5

1,2,4

1,3,5

1,4,5

1,3,4

Step-by-step explanation:

There are only 6 combos for the frame.

step-by-step explanation:

given perimeter: 28cm

length: 9cm

atp,

2(l+w)=p of the reactangle

2(9+x)=28

18+2x=28

2x=28-18

x=10/2

x=5

therefore width is 5 cm