Find the solution to the system of equations by substitution.x + y = -3y = 2x
A. (-1, 2)
B. (1, 2)
C. (1, -2)
D. (-1, -2)
Answer: D
Mathematics
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Use symmetry to evaluate the integral.
A. 
B. 0
C. - 
D. 
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Use the horizontal line test to determine whether the function is one-to-one.
A. Yes B. No
Mathematics
Perform the indicated operations and simplify.Let A = 
, B = 
, and C = 
. Find C(A - B).
A. 
B. 
C. 
D. 
Mathematics
Simplify the expression. Assume that all variables are positive when they appear.
? 
A. 
B. 
C. 
D. 255xy
Mathematics