Answer:
Step-by-step explanation:
General arithmetic sequence formula: 
where 
= first term, and d = common difference.
The first term is -8
And the common difference appears to be - 7 as 7 is subtracted to get to the next term. Ex. -8 - 7 = -15, -15 - 7 = - 22 and so on.
To get the explicit formula of the sequence we simply plug in the values of a1 and d the general arithmetic sequence formula
General formula:
We have 
and d = -7
So the formula to find the nth term would be
Answer:
B
Step-by-step explanation:
If f (x) =- 4x2 +15, then f (-3) = -21
Answer:
250 tagged 5500 total = 15 tagged x total x=330 fish were sampled.
Step-by-step explanation:
A biologist estimated that there were 5500 fish in a lake in which 250 fish had been tagged. A ranger collected a sample in which there were 15 tagged fish. Approximately how many fish were in the sample the ranger collected?
Axis of Symmetry: x = -b/2a
Vertex: y = Ax² + By + c
