Question

http://prntscr.com/e6mrgf

Answer 1

@celticcat

Answer 2

the terms are decreasing by the same amount each time - that is by -3/2 .
This is an arithmetic sequence with common difference -3/2
so (-3/2)n must be a part of the formula
Now the first term is 15 , where n = 1, so the formula for this must be (-3/2)n + 16 1/2

for n = 2 ( the second term) we have (-3/2)*2 + 16 1/2 = -3 + 16 1/3 = 13 1/2

so that checks out therefore the
required formula is (-3/2)n + 16 1/2 Option C

Answer 3

Tysm this rlly helped! <3

Answer 4

Im so happy!

Answer 5

yw