Solve using elimination.
A. x = 
, y = 
; x = - 
, y = 
; x = ,
, y = - 
; x = - 
, y = - 
or (
, 
), (- 
, 
), (
, - 
), (- 
, - 
)
B. x = - 
, y = 
; x = - 
, y = - 
or (- 
, 
), (- 
, - 
)
C. x = 
, y = 
; x = ,
, y = - 
;
or (
, 
), (
, - 
)
D. x = 
, y = 
; x = - 
, y = 
; x = ,
, y = - 
; x = - 
, y = - 
or (
, 
), (- 
, 
), (
, - 
), (- 
, - 
)
Answer: D
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Find the product.(7x - 1)(x2 - 3x + 1)
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Solve the problem by integration.Find the average value of the function 
from x = 3 to x = 7.
A. 
B. 
C. e21 - e9
D. 
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Use the compound interest formulas A = P
nt and 
to solve.Find the accumulated value of an investment of $2,000 at 7% compounded continuously for 3 years.
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