For a class, Mrs. Hawk brought in 7 different packages of
colored pens. The teacher
randomly selects 2 packages.
How many different
combinations are there?

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

Convert the mixed numbers into improper fractions. convert the improper fraction to mixed numbers.

In 2009, there were 1570 bears in a wildlife refuge. in 2010, the population had increased to approximately 1884 bears. if this trend continues and the bear population is increasing exponentially, how many bears will there be in 2018?