Let Mary Sue have m necklaces and Betty have b necklaces.
And they have 603 necklaces altogether, that is
m + b =603
And Mary Sue has 115 more necklaces than Betty, that is
m=b +115
Substituting this value in first equation we will get
b+115+b=603
Subtracting 115
2b= 488
b= 244
So Betty have 244 necklaces .
Answer:
da first one
Step-by-step explanation:
Answer:
D. 30
Step-by-step explanation:
A. 15
3 and 5 are liable. 10 is not
B. 20
5 and 10 liable. 3 is not.
C. 25
5 is liable. 3 and 10 is not.
D. 30
3, 5, and 10 are liable
After every month's withdrawals, 4/5 of the original amount at the start of the month will remain. The amount at the start of every month will change. Thus:
an = 4/5 (an-1) ; where a1 = 500.
