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Mathematics 15 Online
OpenStudy (anonymous):

write each expression without parentheses and shorten it as much as possible. a) 2a+4(7+5a) b) 4(3x+2)-5(7x+5) c) x(x+5) d) 2x+x(x+6)

jimthompson5910 (jim_thompson5910):

I'll do the first one to get you started a) 2a+4(7+5a) 2a+4(7)+4(5a) 2a+28+20a (2a+20a)+28 22a+28 So 2a+4(7+5a) = 22a+28

OpenStudy (anonymous):

b)4(3x+2)-5(7x+5) [4(3x)+4(2)]-[5(7x)+5(5)] [12x+8]-[35x+25] distribute the negative sign... 12x+8-35x-25 -23x-17 the final answer!

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