Question 93051
Given:
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(7x - 11)+(4x - 3)
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Since both of the sets of parentheses are preceded by a + sign, you can remove the parentheses
without changing the signs of the terms inside of the parentheses.  When you remove the
parentheses you have:
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7x - 11 + 4x - 3
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Now combine the like terms.  
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The terms containing an x are 7x and +4x. They both have + signs so when you combine them 
you get +11x. And the terms that are just numbers are -11 and -3. They both have negative 
signs so when you combine them you get -14.  So the answer to this problem is:
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+11x - 14
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Answer a) is the correct answer.
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Hope this helps you to understand the problem.