Simplify the algebraic expression.-3a + 9a
A. -6a
B. 6a
C. -12a
D. 12a
Answer: B
Mathematics
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List the indicated feature of the figure.The faces of
A. 
, 
, 
, 
, 
, 
, 
, 
, 
, 
, 
, 
B. Cannot be identified
C. A, B, C, D, E, F, G, H
D. ?ABCD, ?ABGF, ?AFED, ?BCGH, ?CHED, ?EFGH
Mathematics
Use a calculator to find the following. Round your answer to four places past the decimal point. ? sec 47.9° ?
A. 1.5806 B. 1.4246 C. 1.4916 D. 1.6366 E. 1.3686
Mathematics
Perform the indicated operations and simplify.
+ 
+ 
A. 
B. 
C. 
D. 
Mathematics
Find x and y.
= 
A. x = 
, y = 6
B. x = 4, y = 6
C. x = 5, y = 6
D. x = 3, y = -7
Mathematics