Let x be a number. Translate the English phrase or sentence into a mathematical expression. -4 times a number
A. -4x
B. 4x
C. -4 ÷ x
D. -4 + x
Answer: A
Mathematics
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Find projv u.v = 2i - 2j - 4k, u = 5i - 12k
A. 
i - 
k
B. 
i - 
j - 
k
C. 
i - 
k
D. 
i - 
j - 
k
Mathematics
Solve.Two angles have a sum of 92°. Their difference is 16°. Find the measure of each angle.
A. 40°, 56° B. 54°, 38° C. 52°, 40° D. 77°, 15°
Mathematics
Use the Binomial Theorem to expand the binomial.(
+ 
)4
A. x2 + 4
x1/2 + 18x + 12
x1/2 + 81
B. x2 + 9
C. x2 + 2
x3/2 + 9x + 6
x1/2 + 9
D. x2 + 4
x3/2 + 18x + 12
x1/2 + 9
Mathematics
Perform the indicated operation, whenever possible.
- 
A. [-1]
B. 
C. 
D. 
Mathematics