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Gemiola [76]
3 years ago
10

Jennifer has been saving for college for 57 months. The first month, she saved $11.

Mathematics
2 answers:
meriva3 years ago
8 0
We can translate the following statement into a1 equal to $11, n equal to 57, and s equal to $19799. The formula to be followed through derivation is 
s = (n/2) * (a1 + a1 + d* (n-1))$19799 = (57/2) * (2*11 + d*56)d = $12.01
The answer that is closest is option C
forsale [732]3 years ago
6 0
11*57+X(1+2+3+.....+56)
=11*57+X(1+56)*56/2
=627+1596X
=19779

X=(19779-627)/1596=12
Your answer is C

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