Find the unit vector in the direction of the given vector. Write your answer in the indicated form.Let u = 
. Find the unit vector in the direction of u, and write your answer as a linear combination of the standard unit vectors i and j.
A. 
B. 
i - 
j
C. 
i - 
j
D. 
i - 
j
Answer: B
Mathematics
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Graph the pair of parametric equations with the aid of a graphing calculator.x = 4(t - sin t), y= 4(1 - cos t), 0 ? t ? 4? 
A. 
B. 
C. 
D. 
Mathematics
Write the system in the form 
Then solve the linear system by computing 
with a calculator. Round numbers to the nearest tenth, as necessary.1.8x + 15.3y - 4.6z = 3.15.1x - 7.0y - 0.6z = -3.82.6x - 4.8y - 4.7z = 9.9
A. (-2.4, -0.6, -3.9) B. (-6.5, -1.6, -10.6) C. (4.0, 1.0, 6.5) D. (-1.6, -0.4, -2.6)
Mathematics
Find the equation in standard form of a hyperbola centered at the origin that passes through the given points and whose graph approaches the given asymptotes.(0, -4) and (0, 4); y = -4x and y = 4x
A. 
- y2 = 1
B. 
- x2 = 1
C. y2 - 
= 1
D. 
- x2 = 1
Mathematics
Simplify.
? 
A. 
B. 
C. 
D. 
Mathematics