Find the sum.(-6) + (-1) + 4 + 9 + ... + 39
A. 170
B. 165
C. 330
D. 160
Answer: B
Mathematics
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Solve the problem.How many liters of a 20% alcohol solution must be mixed with 20 liters of a 60% solution to get a 30% solution?
A. 8 L B. 60 L C. 6 L D. 80 L
Mathematics
Perform the indicated operations.
A. -1 B. 1 C. 9 D. -9
Mathematics
Use the quadratic function to determine if the function has a maximum or minimum value and then find this maximum or minimum value.f(x) = x2 + 18x + 71
A. maximum at (0, -9) B. minimum at (-9, -10) C. maximum at (-10, -9) D. minimum at (-10, 0)
Mathematics
Find the inverse of the function.f(x) = 
A. f-1(x) = 
B. f-1(x) = x2 - 3, x ? 0
C. f-1(x) = (x + 3)2
D. Not a one-to-one function
Mathematics