Solve the problem.During the first five months of the year, Len earned commissions of $3880, $2490, $2180, $2810, and $2760. If Len must have average monthly earnings of at least $2900 in order to qualify for retirement benefits, what must he earn in the sixth month in order to qualify for benefits?
A. at least $2900
B. at least $3280
C. at least $2836
D. at least $2824
Answer: B
Mathematics
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Subtract and simplify.38
- 25
A. 11
B. 13
C. 12
D. 12
Mathematics
Find the inverse of the matrix. 
A. 
B. 
C. 
D. 
Mathematics
Find the vertices and graph the hyperbola.x2 - 4y2 = 64
A. (0, -8), (0, 8)
B. (-4, 0), (4, 0)
C. (-4, 0), (4, 0)
D. (-8, 0), (8, 0)
Mathematics
Use a graphing utility to find the equation of the line of best fit. Round to two decimal places, if necessary.
A. y = 9.2x - 2.1 B. y = 9.8x - 2.6 C. y = 9x - 3 D. y = 10x - 3
Mathematics