Decide whether the matrices are inverses of each other. (Check to see if their product is the identity matrix I.)
and 
A. Yes
B. No
Answer: A
Mathematics
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Evaluate.Find (f + g)(-1) when f(x) = x + 5 and g(x) = x + 2.
A. -9 B. 1 C. 5 D. -5
Mathematics
Find the x-intercepts (if any) for the graph of the quadratic function.f(x) = 2x2 - 6x - 20
A. (2, 0) and (-5, 0) B. (-2, 0) and (-5, 0) C. (-2, 0) and (5, 0) D. (2, 0) and (5, 0)
Mathematics
Simplify. Assume that all variables represent nonnegative numbers.3
A. 18x4
B. 18x3
C. 9x4
D. 9x3
Mathematics
Find functions f and g so that f ? g = H.H(x) = ?4x + 3?
A.
| f(x) = ?-x?; | g(x) = 4x - 3 |
B.
| f(x) = x; | g(x) = 4x + 3 |
C.
| f(x) = -?x?; | g(x) = 4x + 3 |
D.
| f(x) = ?x?; | g(x) = 4x + 3 |
Mathematics