Add and simplify.
+ 
A. 
B. 
C. 
D. 
Answer: C
Mathematics
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Add.-220 + 450
A. 670 B. 230 C. -670 D. -230
Mathematics
Evaluate the expression. 
A. 1,235,520
B. 8,648,640
C. 
D. 1716
Mathematics
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)
Mathematics
Perform the indicated operation.8.166 - 3.821
A. 4.445 B. 4.245 C. 11.987 D. 4.345
Mathematics