For the given system of equations, which method would be the most efficient method to use when solving the system of equations: substitution, addition, or either?y = - 
x - 53x + 7y = 19
A. substitution
B. addition
C. either
Answer: A
Mathematics
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Find the component form of the indicated vector.Let u = 
, v = 
. Find -u - v.
A. 
B. 
C. 
D. 
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Write the ratio or rate in simplest form.Steve traveled 711 miles in 27 hours.
A. 
B. 
C. 
D. 
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Form a valid conclusion, using all the statements for each argument. Give reasons. ? If we go to the theater, then we are enlightened. We are not enlightened.
A. We do not go to the theater. (indirect) B. We go to the theater. (indirect) C. We do not go to the theater. (direct) D. We go to the theater. (direct) E. none of these
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Solve the equation.
y + 3 = 4
A. 14 B. 16 C. -14 D. -16
Mathematics