Arithmetic sequences have a common difference (addition)
geometric sequences have a common ratio (multiplication)
20*25= 500
that is how many there should be
500-5=495
that is how many they set up
Answer:
42
Step-by-step explanation:
there are a possible 6 combinations for a sum of 7:
1,6
6,1
2,5
5,2
3,4
4,3
so we can create this proportion:
7/36 = n/216
n = # times to roll a sum of 7 out of 216
now cross-multiply:
36n = 1512
n = 1512/36
n = 42