Solve the following system by any appropriate method. If there is no real number solution, so state.x + y = 11x2 + y2 = 5
A. (11, 5), (11, -5), (-11, 5), (-11, -5)
B. (11, 
), (11, -
), (-11, 
), (-11, -
)
C. (5, 
), (5, -
), (-5, 
), (-5, -
)
D. no real solution
Answer: D
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Write the equivalent fractions with the least common denominator.
and 
and 
A. 
= 
; 
= 
; 
= 
B. 
= 
; 
= 
; 
= 
C. 
= 
; 
= 
; 
= 
D. 
= 
; 
= 
; 
= 
The graph below shows estimated world population for the period 4000 BC - 2000 AD. Note that the logarithm of the world population and not actual population is plotted on the vertical axis. This means, for example, that when the graph reaches 7 on the vertical scale, world population is 107 and when the graph reaches 9 on the vertical scale, world population is 109. Log World Population 
? Year Use the graph to answer the question.During the period 4000 BC to 1000 BC, approximately what was the doubling time for world population?
A. Approximately 3000 years B. Approximately 1000 years C. Approximately 5000 years D. Approximately 23,000 years
Determine whether the graph of the equation is symmetric with respect to the x-axis, the y-axis, and/or the origin.y2 - x - 25 = 0
A. origin B. x-axis C. y-axis D. x-axis, y-axis, origin E. none
Express as a single logarithm.logbs - logbb
A. log2b
B. logbs - b
C. logb
D. logb