The characters À , Á, Â, Ã, Ä, Å, or à , á, â, ã, ä, å are all variations of the letter “A” with different accent marks or diacritical marks. These marks are also known as accent marks which are commonly used in many languages to indicate variations in pronunciation or meaning. Aponzo. 1,880 likes · 11 talking about this. Baby goods/kids goods Could I get a few people to explain the difference in pronunciation between a, á, ã, â and à in Portuguese using English comparisons (if possible)? I can't seem to find a thread or other Web site that addresses them each clearly. Thanks! Find the value of 5a + b given matrix A and its properties involving adjugate and transpose.