Stinkypuppy1903 Stinkypuppy1903

13-02-2016
Mathematics

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Which expression is equal to 3(5x - 6) -2(4x + 5)? A) 7x - 1 B) 9x - 1 C) 9x - 13 D) 7x - 28

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SmarticalParticals SmarticalParticals

13-02-2016

3 (5x-6)-2 (4x+5)
1st Distribute the 3 and -2
15x-18-8x-10
Now combine like terms
7x-28 answer D

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Exvited Exvited

13-02-2016

[tex]3(5x - 6) -2(4x + 5) \\ \\ 15x - 18 - 8x - 10 \ / \ expand \\ \\ (15x - 8x) - 18 - 10 \ / \ gather \ the \ like \ terms \\ \\ 7x - 18 - 10 \ / \ simplify \\ \\ 7x - 28 \ / \ simplify \\ \\ [/tex]

The final result is D) 7x - 28.

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