Solve the system by the substitution method.
A. {(-2, 3)}
B. {(12, -2)}
C. ?
D. {(x, y) 
Answer: B
Mathematics
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Find the exact value of the expression.
A. - 
B. -2
C. - 
D. -
Mathematics
Graph the function.f(x) = 2
A. 
B. 
C. 
D. 
Mathematics
A plane is flying with an airspeed of 245 miles per hour with heading 276.2°. The wind currents are running at a constant 47.2 miles per hour in the direction 266.1°. Find the ground speed and true course of the plane. ? Apply the rules regarding the use of significant digits after all computations are complete. ?
A. 292 mph with heading 274.6° B. 302 mph with heading 274.6° C. 292 mph with heading 273.8° D. 292 mph with heading 294.6° E. 302 mph with heading 294.6°
Mathematics
Identify and graph the polar equation.r2 = 3 cos(2?) 
A. 
lemniscate
B. 
rose with four petals
C. 
rose with four petals
D. 
lemniscate
Mathematics