Solve the system of equations by the substitution method.y = 
x - 20y = 
x - 46
A. {(60, -10)}
B. {(60, 10)}
C. 
D. {(120, 0)}
Answer: A
Mathematics
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Multiply. Simplify the answer completely.- 
? 
A. - 
B. 
C. - 
D. 
Mathematics
Determine whether the equation is quadratic.-4x2 + x = 7
A. No B. Yes
Mathematics
Solve.x = 2644 + 2530
A. 5137 B. 6174 C. 5174 D. 5074
Mathematics
Provide an appropriate response.Is 
always equal to 
?
A. Yes B. No
Mathematics