For what value of a does the equation 
represent a circle with center 
? When a assumes this value, what is the radius of the circle?
?
A. 
, 
B. ?
, 
C. ?
, 
D. ?
, 
E. ?
, 
Answer: A
Mathematics
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Find 
by using the Chain Rule. Express your final answer in terms of t.w = 
, x = 3t + 1, y = et, z = 6t - 1
A. 
B. 
C. 
D. 
Mathematics
Find the exact value of the expression.cos 
cos 
+ sin 
sin 
A. 1
B. 
C. 
D. 
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Use a calculator to find the approximate value of the composition. Round your answer to four decimal places. The expression may be undefined.cos (cos-1 (-0.9372))
A. -0.4686 B. 0.9372 C. 0.4686 D. -0.9372
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Simplify.8a - 2a - a - 12
A. 6a - 13 B. 5a - 12 C. 6a - a - 12 D. 6a - 12
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