Question: Find a + b ,4 a +7 b , | a |, and | a b |. (Simplify your answer completely.) a = 3, 4

Find

a+b,4a+7b, |a|, and |ab|.

(Simplify your answer completely.)

a=

3, 4

, b=

9,1

a+b =

4a+7b =

|a| =

|ab| =

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