Simplify the expression. Assume that all variables are positive when they appear.
A. 2y4 
B. 2x7y8 
C. 2x3y4 
D. 2x3y4 
Answer: D
Mathematics
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Solve the system by graphing.3x + 2y = 28-2x + 3y = 16
A. (8, 4) B. (3, 22) C. (4, 8) D. No solution
Mathematics
Find dy/dx by implicit differentiation. If applicable, express the result in terms of x and y.
= 8x - 9
A. 
B. 
C. 
D. 
Mathematics
Perform the indicated operation. 
÷ 
A. 
B. 
C. 
D. 
Mathematics
Write the vector in terms of the unit vectors i and j.v = 
A. -5 - 4j B. -5i - 4j C. -5i - 4 D. (-5 + i) - 4j
Mathematics