Solve the system of equations. x + y + z = 7 x - y + 2z = 75x + y + z = 11
A. (1, 4, 2)
B. (1, 2, 4)
C. (4, 2, 1)
D. (4, 1, 2)
Answer: B
Mathematics
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Solve the problem.If the price charged for a candy bar is p(x) cents, then x thousand candy bars will be sold in a certain city, where p(x) = 141 - 
. How many candy bars must be sold to maximize revenue?
A. 1,974 candy bars B. 1,974 thousand candy bars C. 3,948 thousand candy bars D. 3,948 candy bars
Mathematics
Find the point(s) at which the given function equals its average value on the given interval.f(x) = 
; [0, 12]
A. 6
B. 5
C. 
D. 7
Mathematics
Solve the equation and check your solution.
= - 
A. -2, 2 B. 2 C. -2, 0, 2 D. no solution
Mathematics
Simplify the expression.
A. 
B. - 
C. 
D. 
Mathematics