Perform the indicated operations and simplify.
A. 
B. 
C. 
D. 
E. 
Answer: A
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A cohort of fish is a group of fish of the same age. For a certain fish in the North Sea, the total biomass B, in pounds, of a cohort of age 
years is given by
.
?
A: Make a graph of B versus 
for fish up to 30 years old.B: Fishing of a cohort is allowed if the biomass of that cohort is at least 2,000 pounds. Add the graph of 
to the graph you made in part A.C: What age cohorts are allowed to be fished? Round your answer to two decimal places.
What will be an ideal response?
Find the quantity indicated.b varies directly as a. Find k when a = 72 and b = 6.
A. k = 13
B. k = 12
C. k = 
D. k = 66
Solve the inequality.x2 + 6x ? -8
A. -4 ? x ? -2 B. 2 ? x ? 4 C. 2 < x < 4 D. x ? 2 or x ? 4
Combine like terms in the expression. Answer "not possible" if terms cannot be combined.3x + 12x
A. 30x B. 36x C. 15x2 D. 15x