Simplify the expression.(
+ 
)(
- 7
)
A. 
- 6
- 7
B. m - 6
- 7n
C. m - 7n
D. m2 - 6mn - 7n2
Answer: B
Mathematics
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Compute the unit binormal vector and torsion of the curve. r(t) = 
A. B(t) = 
, ? = 1
B. B(t) = 
, ? = 0
C. B(t) = 
, ? = 1
D. B(t) = 
, ? = 0
Mathematics
2
? 4
A. 6
B. 32
C. 9
D. 8
Mathematics
Graph the linear function by plotting the x- and y-intercepts.5x - 15y - 30 = 0
A. intercepts: (0, -6), (2, 0)
B. intercepts: (0, -2), (-6, 0)
C. intercepts: (0, -2), (6, 0)
D. intercepts: (0, 6), (-2, 0)
Mathematics
Solve the problem.Mardi received an inheritance of $70,000. She invested part at 9% and deposited the remainder in tax-free bonds at 4%. Her total annual income from the investments was $5300. Find the amount invested at 9%.
A. $25,000 B. $49,000 C. $64,700 D. $50,000
Mathematics