Find u ? v.u = 
, v = 
A. 15
B. -45
C. 27
D. -25
Answer: C
Mathematics
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Find an equation of a parabola satisfying the given conditions.Focus at (-4, 0), directrix x = 4
A. y2 = 16x
B. 16y = x2
C. y = - 
x2
D. x = - 
y2
Mathematics
Solve the problem.Find the perimeter of a rectangle with length of 152.88 in. and width of 
A. 549.68 in. B. 18,645 in. C. 549.7 in. D. 18,645.2 in.
Mathematics
Write the complex number in the form a + bi.4(cos -135° + i sin -135°)
A. -2
- 2
i
B. - 
- 
i
C. - 
+ 
i
D. -2
+ 2
i
Mathematics
The sizes of two matrices are given. Find the size of the product AB and the size of the product BA, if the given product can be calculated.A is 1 × 3; B is 3 × 1.
A. AB is 1 × 1; BA cannot be calculated. B. AB is 1 × 1; BA is 3 × 3. C. AB is 3 × 3; BA is 1 × 1. D. AB cannot be calculated; BA is 3 × 3.
Mathematics