Use the commutative or the associative property to complete the statement. State which property is used.8 ? (4 ? 2) = (8 ? 
) ? 2
A. -4; commutative property
B. 4; associative property
C. -4; associative property
D. 4; commutative property
Answer: B
Mathematics
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Find the area.Find the area between the graph of y = 
and the x-axis, for -? < x ? 0.
A. 4 B. 1 C. 2 D. 8
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Write the standard form of the equation of the circle tangent to the y-axis and with center (-3, -6). ?
A. ?
B. 
C. 
D. 
E. 
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Fill in the blank with one of the words or phrases listed below. 
A combination of operations on variables and numbers is called a(n) 
.
A. exponent B. addend C. equation D. expression
Mathematics
In the problem, t is a real number and P = (x, y) is the point on the unit circle that corresponds to t. Find the exact value of the indicated trigonometric function of t.(
, - 
)Find cos t.
A. - 
B. 
C. 
D. - 
Mathematics