Answer:
Mean = 45.178
Standard Deviation = 10.33
Step-by-step explanation:
class m frequency, f m 
f f 
25 - 34 29.5 22.1 651.95 19232.525
35 - 44 39.5 31.5 1244.25 49147.875
45 - 54 49.5 37.7 1866.15 92374.425
55 - 64 59.5 25.3 1505.35 89568.352
116.6 5267.7 250323.15
mean = 
standard deviation = 
8 because there are 16 fish and 8 died and 8 are still alive
hope this helped
Answer:
8x +5
Step-by-step explanation:
The sum is found by combining "like" terms—those that have the same arrangement of variables.
The first expression, 2x +6, has terms 2x and 6.
The second expression, 6x -1, has terms 6x and -1.
In each case, the first term listed is first-degree in the variable x. These are "like" terms, so can be added:
... 2x +6x = (2+6)x = 8x
The second term listed in each case is a constant. These are "like" terms, so can be added:
... 6 + (-1) = 5
Then the sum of the given expressions is the sum of the results from adding like terms:
... 8x + 5
The second option is the right one
