Clear fractions then solve by substitution.
- 
= 
+ 
= 
A. 
B. 
C. 
D. 
Answer: B
Mathematics
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Find the magnitude of u × v and the unit vector parallel to u × v in the direction of u × v.u = 2i + 2j - k, v = -i + k
A. 3; 
i + 
j - 
k
B. 3; 
i - 
j + 
k
C. 9; 
i - 
j + 
k
D. 9; 
i + 
j - 
k
Mathematics
Find the unit tangent vector for the curve given by r(t)= Figure 3.png)
 multiple choice.png)
Mathematics
Write the binomial expansion of the expression.(2x + 1)5
A. (4x2 + 4x + 1)5 B. 32x5 + 80x4 + 80x3 + 40x2 + 10x + 1 C. 32x5 + 16x4 + 8x3 + 4x2 + 2x + 1 D. 32x5 + 10x4 + 40x3 + 40x2 + 10x + 1
Mathematics
Find an equation for the ellipse described.Foci at (±4, 0); x-intercepts are ±5
A. 
+ 
= 1
B. 
+ 
= 1
C. 
+ 
= 1
D. 
+ 
= 1
Mathematics