Answer:
d = 1000 is the correct answer to that question
You want 
. We can go about this by casework. WLOG x=9, we have 8 digits: 1-8. With x=8 we have 2-9, but we already counted 8 and we already considered the 9 case, so we have 2-7 actually, which will give us 6 numbers. With x=7, with the same logic we are only looking for the numbers 3-6 which there are 4 of. With x=6, you are looking for the numbers 4-5 which are 2. With x=5 run out of numbers to pick. The numbers are indistinguishable and it does not matter whether we use x or y so we just have to ad up the cases we already have to get: 20.
Answer:
1
Step-by-step explanation:
16 cups of water - 4 cups of paper
4 cups of water - 
× 4 cups of paper = 1 cup of paper
Answer:
c.
Step-by-step explanation:
