Provide an appropriate response.According to the rules for the order of operations, what should be the first step when simplifying the expression [-5 + (-9 + 7)] + (-7 + 8)?
A. find the sum of -5 and -7
B. find the sum of -5 and -9
C. find the sum of -9 and 7
D. find the sum of 7 and -7
Answer: C
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Solve the problem.A new exhibit is scheduled to open at the local museum. Museum officials expect that 8000 people will visit the exhibit in its first week, and that the number of visitors will drop by 10 people per week after the first week during the first 6 months. Find the total number of visitors expected in the exhibit's first 7 weeks.
A. 47,850 visitors B. 55,730 visitors C. 55,790 visitors D. 39,850 visitors
Determine whether the given function is one-to-one. If it is one-to-one, find a formula for the inverse.f(x) = x 
A. f-1(x) = x 
B. f-1(x) = x3 - 9
C. Not one-to-one
D. f-1(x) = x2 + 9
Find the limit as x approaches c of the average rate of change of the function from c to x.c = -2; f(x) = 4x2 - 4
A. 16 B. -20 C. -16 D. Does not exist
Factor completely. If the polynomial cannot be factored, say it is prime.15x3 + 4x2 - 4x
A. x2(3x + 2)(5x - 2) B. x(3x + 2)(5x - 2) C. x(5x + 2)(3x - 2) D. (3x2 + 2)(5x - 2)