Solve the system of equations using substitution.
A. x = 0, y = 2; x = 
, y = 
or 
, 
B. x = 0, y = -2; x = - 
, y = 
or 
, 
C. x = 0, y = -2; x = 
, y = 
or 
, 
D. x = 0, y = 2; x = - 
, y = 
or 
, 
Answer: D
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Find an approximation of the area of the region R under the graph of the function f on the interval [a, b]. Use n subintervals and choose the representative points as indicated. Please round your answer to two decimal places.
?
; 
; 
; midpoints
?
A. 182.27 sq units
B. 308.77 sq units
C. 562.61 sq units
D. 416.79 sq units
E. 385.87 sq units
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A. y = 
B. y = 
C. y = 
D. y = 8x
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