Find u ? v, where ? is the angle between the vectors u and v. Round the answer to the nearest tenth.
=3, 
= 3, ? = 141°
A. -7
B. -4.7
C. -7.7
D. -11.6
Answer: A
Mathematics
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Factor: 3x3 + 12x2 - 9x
a. 3(x3 + 12x2 - 9x) b. 3(x3 + 12x) c. 3x(x2 + 4x - 3) d. 3x(x2 + 3x) e. 3x(x2 + 12x2)
Mathematics
Simplify.
A. - 
B. 
C. 
D. 
Mathematics
Expand the expression using the Binomial Theorem.(x5 + 3y)4
A. x20 + 9x15y + 54x10y2 + 81x5y3 + 81y4 B. x9 + 9x8y + 54x7y2 + 81x5y3 + 81y4 C. x9 + 12x8y +18x7y2 + 12x5y3 + 3y4 D. x20 + 12x15y + 54x10y2 + 108x5y3 + 81y4
Mathematics
Add or subtract as indicated. Express the answer as a single polynomial in standard form.(-4x4 + 8x6 - 4 + 2x5) - (-2 - 7x5 + 2x6 - 7x4)
A. 10x6 - 5x5 - 11x4 - 2 B. 6x6 + 9x5 + 3x4 - 2 C. 10x6 - 5x5 - 11x4 - 6 D. 6x6 - 5x5 - 11x4 - 6
Mathematics