A equals -1/2 is the right answer
11 divided by 9 is 1.2 repeating so Ellie will have to do about 1.3 parts a week
We have the following remark
-81/-54= -54/-36 = -36/ -24=...= 1.5
the sequence is geometric sequence
the common ratio of the sequence is 1.5
the sum of the five terms of the sequence is
S5= a[1- (1.5)^5 / 1-1.5], a first term,
S5= -42*6.5= - 276
Answer:
As one thing decreases, the other increases
Step-by-step explanation: