Which of the following is a technique for effective communication? a. use witticisms in conversations to keep it engaging b. keep eye contact to a minimum c. check for comprehension and accuracy d. use a sophisticated vocabulary

To have an effective communication, one must be able to keep eye contact to people. Second would be using witticisms in conversations to keep it engaging. Keeping an eye contact is needed because this catches your listeners attention, you let them feel that you are actually talking to them and you acknowledge their presence while they are listening to you. Using witticisms is also encouraged but it depends on the type of people you are engaging to and what topic you are talking about.

substitute y = 2x - 4 to x + 2y = 12:

x + 2(2x - 4) = 12     use distributive property

x + (2)(2x) + () = 12

x + 4x - 8 = 12     add 8 to both sides

5x = 20     divide both sides by 5

x = 4

put the value of x to the first equation:

y = 2(4) - 4

y = 8 - 4

y = 4

answer: x = 4 and y = 4