Solve for the indicated variable.Solve for x.2x2 - 4xy + 3y2 = 1
A. x = -y ± 2
B. x = y ± (1 - y)
C. x = -y ± 
D. x = 
Answer: D
Mathematics
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For the curve r(t), write the acceleration in the form aTT + aNN.r(t) = 
(1 + t)3/2i + 
(1 - t)3/2j + 2tk
A. a = 2
T
B. a = 2
N
C. a = T + 2
N
D. a = 
N
Mathematics
Solve the problem.Find the centroid of the rectangular solid defined by 
, 
, 
.
A. 
= 
, 
= 1, 
= 2
B. 
= 
, 
= 
, 
= 
C. 
= 
,
= 2, 
= 4
D. 
= 5, 
= 4, 
= 8
Mathematics
Write the vector v in the form v1i + v2j, given 
and the angle ? that v makes with the positive x-axis.
= 11, ? = 150°
A. 
i + 
j
B. 
i - 
j
C. - 
i + 
j
D. 11i + 
j
Mathematics
Decide whether or not the functions are inverses of each other.f(x) = - 
x, g(x) = - 3x
A. Yes B. No
Mathematics