Question

1) What are all the 4 digit numbers you can write using the digits 2, 5, 7, and 9? Each digit only once in a number. please write the possible numbers.
2) Rocco has five 20 cent stamps and 3 35 cent stamps. What amounts of postage can he make using one or more stamps? please show all possible ways and show work.

Answer 1

1) you could make 4! = 4*3*2*1 = 24 four digits numbers with 2, 5, 7, and 9
2) in this one you have to find all possible combinations of 1 stamp, 2 stamps, 3 stamps ..... 8 stamps

Answer 2

@swissgirl

Answer 3

wait ill brb

Answer 4

k

Answer 5

1) ok we have 4 digits, 2,5,7and 9 and we would like to know all the possible combinations
So the first place we have 4 options, in the second place we have 3 options since we chose our first option, in third place we have 2 options since we have chosen our first 2 options and in our last place we have one option cuz the other 3 digits have been placed already
so that is 4*3*2*1=24 So we there are 24 possible combinations of these 4 digits

Answer 6

2

Answer 7

waittt a sec I unsure what the first part of the question is actually saying. I am not sure if it wants the amount or the diff options I guess you can state both
2579 5279 7529 9572
2597 5297 7592 9527
2957 5927 7952 9725
2975 5972 7925 9752
2795 5792 7295 9275
2759 5729 7259 9257
Here are all the possible combinations and if u will count them there will be 24 diff combinations

Answer 8

This is still for part 1

Answer 9

could you please help me with # 2?

Answer 10

yes give me a few seconds

Answer 11

just have to write out all the options
Do u need a formula or do u just have to list all teh options

Answer 12

please

Answer 13

Do u need a formula or u need to write out all the options or u just dont get what i am even saying

Answer 14

formula

Answer 15

ohhhhhhh okkk that is simpler

Answer 16

or you could give me the options if you dont know the formula

Answer 17

nah i can figure out the formula i think its simple

Answer 18

k

Answer 19

There can be repeats and I dont know a formula for repeats hmmmmmm

Answer 20

there might not be a formula

Answer 21

Still working on it give me a few more seconds

Answer 22

k

Answer 23

ok i realized a pattern already but i didnt finish writing out all the options
2+3+4+5+6+7+8+9=44 there shld be 44 options
Like when we have one stamp there are 2 options
When we have 2 stamps there are 3 options
and so forth but I didnt finish getting all the options

Answer 24

20
35
20 20
35 35
20 35
20 20 20
20 35 20
35 20 25
35 35 35
20 20 20 20
20 35 35 35
20 20 35 35
20 20 20 35
35 35 35 35
20 20 20 20 20
20 35 35 35 35
20 20 35 35 35
20 20 20 35 35
20 20 20 20 35
35 35 35 35 35
20 20 20 20 20 20
20 35 35 35 35 35
20 20 35 35 35 35
20 20 20 35 35 35
20 20 20 20 35 35
20 20 20 20 20 35
35 35 35 35 35 35
20 20 20 20 20 20 20
20 35 35 35 35 35 35
20 20 35 35 35 35 35
20 20 20 35 35 35 35
20 20 20 20 35 35 35
20 20 20 20 20 35 35
20 20 20 20 20 20 35
35 35 35 35 35 35 35
20 20 20 20 20 20 20 20
20 35 35 35 35 35 35 35
20 20 35 35 35 35 35 35
20 20 20 35 35 35 35 35
20 20 20 20 35 35 35 35
20 20 20 20 20 35 35 35
20 20 20 20 20 20 35 35
20 20 20 20 20 20 20 35
35 35 35 35 35 35 35 35
There are the 44 options

Answer 25

hahaah I dont know of a formula but all i noticed was that each option had one more
so option #1 =2
option#2= option#1 +1
option #3= option#2 +1
option #4 = option#3 +1
So its kinda like a recurring sequence that was the best formula i thought of lol

Answer 26

k thanks

Answer 27

is this what u needed?

Answer 28

yes

Answer 29

Great :)