?Find the inverse of the matrix 
using elementary matrices.
?
A. ?
B. ?
C. ?
D. ?
E. ?
Answer: A
Mathematics
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Decide whether the statement is always true, sometimes true, or never true.The difference between two positive numbers is negative.
A. Always true B. Never true C. Sometimes true
Mathematics
Find the distance between P and Q and the coordinates of the midpoint of the segment joining P and Q.
A. 
; 
B. 
; 
C. 
; 
D. 
; 
Mathematics
Solve.Recall that 
is the formula for the area of a square. If the area of a square is represented by 
how can the length of each side be represented?
A. x + 8 B. (x + 8)2 C. x - 8 D. (x - 8)2
Mathematics
Use the definition of continuity to determine whether f is continuous at a.f(x) = 
a = 0
A. Continuous B. Not continuous
Mathematics