Find the indicated vector.Let u = 
. Find 3u.
A. 
B. 
C. 
D. 
Answer: D
Mathematics
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Use Heron's formula to determine the area of the triangle. If necessary, round the answer to two decimal places. 
A. 53.67 B. 3.87 C. 1.73 D. 16.97
Mathematics
Multiply.(967)(86)
A. 83,162 B. 83,152 C. 83,172 D. 83,262
Mathematics
Solve.?5x + 9? < 2
A. x < - 
or x > - 
B. x < 5
C. x < - 
D. - 
< x < - 
Mathematics
Find an equation of a parabola satisfying the given conditions.Focus at (0, -3?), directrix y = 3?
A. y2 = 4?x B. x2 = -3?y C. x2 = -12?y D. y2 = -12?x
Mathematics