Step-by-step explanation: negative .8 plus a positive value of 4.2 equals 3.4 C isnt the answer, wth! do you think that 4.3 plus 4.2 equals 3.4? honestly, dont post answers if you arent even going to slightly consider the facts. the other answer is a clear example of someone just trying to get points. or maybe a child trying to be helpful. im not trying to be mean, just dont post things you dont know mk buddy? <em>THE ANSWER IS A: NEGATIVE .8 ADDING A VALUE OF 4.2.</em> <u><em>-0.8 + 4.2 = 3.4 = A</em></u>
