Answer:
57, 53, 49, 45
Step-by-step explanation:
Substitute for the n for n=1,2,3,4 so the first term is 57-4(1-1) so =57-4(0) so
a(1) = 57-0 = 57 so that is the 1st term
2nd term 57-4(2-1) so =57-4(1) so a(2) = 57-4 = 53, etc.
She types in 450 words in 5 minutes
180/2=90
90*5=450
I'm guessing the repeating part is 89 at the end, so that
Then
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An arguably quicker way without using geometric series:
W=4 that the answer !!!!!