Combine like terms.-9b + 4b
A. 5b
B. -5b2
C. -13b
D. -5b
Answer: D
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and 
. For what ?y value does the point
?
A. 
B. ?
C. ?
D. ?
Find the determinant of the given matrix.
A. -280 B. 280 C. 217 D. -343
Decide whether the given number is a solution to the equation preceding it.(x - 2)2 = 49; 5
A. Yes B. No
Find the exact value of the trigonometric expression without the use of a calculator.If sin ? = - 
, 
< ? < 2? and tan ? = - 
, 
< ? < ?, find the exact value of cos (? + ?).
A. 
B. 
C. - 
D. 