Find the value of the determinant.
A. -111
B. 71
C. -85
D. 111
Answer: D
Mathematics
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Set up a matrix equation with integer values that is equivalent to the system of equations.
What will be an ideal response?
Mathematics
Perform the indicated operations and simplify the result. Leave the answer in factored form.
- 
A. 
B. 
C. 
D. 
Mathematics
Solve the problem.During the first five months of the year, Len earned commissions of $2620, $3880, $2350, $3760, and $3180. If Len must have average monthly earnings of at least $3000 in order to qualify for retirement benefits, what must he earn in the sixth month in order to qualify for benefits?
A. at least $2210 B. at least $3131 C. at least $3158 D. at least $3000
Mathematics
Solve.
= -10
A. {10, -10} B. ? C. {-10} D. {10}
Mathematics