Solve. Check for extraneous solutions.
= x - 1
A. {-5}
B. {4}
C. {5}
D. 
Answer: C
Mathematics
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Find 
and 
.f(x, y) = x3 - 7x2y + 2xy3
A. 
= 3x2 + 2xy + 2y3; 
= -7x2 + 3xy2
B. 
= 3x2 - 14xy + 2y3; 
= -7x2 + 6xy2
C. 
= x2 - 7xy + 2y3; 
= -7x2 + 2xy2
D. 
= 3x2; 
= -7x2 + 6xy2
Mathematics
If ?DEF is isosceles and ET bisects ?DEF, then
(a) ET ? DF. (b) ET bisects DF. (c) Neither (a) nor (b) is necessarily true. (d) Both (a) and (b) are true. (e) ?DET ? ?FET.
Mathematics
Find the mean.9, 9.8, 6.8, 9.8, 6.6
A. 9 B. 9.8 C. 8.4 D. 7
Mathematics
Express the graph shown using interval notation. Also express it as an inequality involving x.
A. [4, 7) 4 ? x < 7 B. [4, 7] 4 ? x ? 7 C. (4, 7] 4 < x ? 7 D. (4, 7) 4 < x < 7
Mathematics