Graph the equations.f(x) =  - 9

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Answer: D

Mathematics

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Part of $6,000 is invested at 9%, another part at 11%, and the remainder at 12% yearly interest. The total yearly income from the three investments is $650. The sum of the amounts invested at 9% and 11% equals the amount invested at 12%. How much is invested at each rate? 

A. $2,000 at 9%, $1,000 at 11%, and $3,000 at 12% B. $1,500 at 9%, $0 at 11%, and $3,500 at 12% C. $3,000 at 9%, $0 at 11%, and $3,000 at 12% D. $1,500 at 9%, $1,000 at 11%, and $3,500 at 12% E. $2,500 at 9%, $2,000 at 11%, and $2,000 at 12%

Mathematics

Use Cramer's rule to find the solution of the system, if possible. ? ?

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Mathematics

Write the statements S1, S2, and S3 and determine if each statement is true.Sn: 12 + 42 + 72 + . . . + (3n - 2)2 = 

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Mathematics

Is the figure Saccheri quadrilateral? Answer yes or no.

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Mathematics