You don't flip; you cross multiply proportions
The combinations formula is nCr =

n = complete value set r = desired goal
to find combinations we find all combos for 5,6,7,8,and 9 and add them together.
which come out as 126, 84, 36, 9 and 1
Therefore there are 256 combinations
we know that
cup of flour is used to make
dinner rolls.
Part a) How much flour is needed to make one dinner roll?
by using proportion

therefore
the answer Part a) is
To make one dinner roll is needed
cup of flour
Part b) How many cups of flour are needed to make 3 dozen dinner rolls?
Multiply the value obtained in part a) by 
so


therefore
the answer Part b) is
To make
dozen dinner rolls are needed
cup of flour
Part c) How many rolls can you make with 5 2/3 cups of flour?

by using proportion

therefore
the answer part c) is
rolls
Answer: the plain pencil costs 10 cents and the colored pencil costs 20 cents
<u>4</u>
<u></u>
Explanation:
3, 4, 2, 8, 5
<u>arrange in ascending order</u>
2, 3, 4, 5, 8
<u>Identify the integer at the middle</u>
median: 4