The sum of two numbers is 8. Is it possible for the difference of the two numbers to also be 8? Why or why not

To show that polygon abcde is congruent to polygon fghij, a must be used to make the two polygons coincide. a sequence of two transformations that can be used to show that polygon abcde is congruent to polygon fghij is .

Does anyone know how to solve and graph this: 4 + | a + 2 | < 7the only part i don't get is the "4 +"

Afrequency table of grades has five classes (a, b, c, d, f) with frequencies of 3, 13, 14, 5, and 3 respectively. using percentages, what are the relative frequencies of the five classes?