Write 5 additions and 5 subtraction equation

Use the frequency distribution, which shows the number of american voters (in millions) according to age, to find the probability that a voter chosen at random is in the 18 to 20 years old age range. ages frequency 18 to 20 5.9 21 to 24 7.7 25 to 34 20.4 35 to 44 25.1 45 to 64 54.4 65 and over 27.7 the probability that a voter chosen at random is in the 18 to 20 years old age range is nothing. (round to three decimal places as needed.)

Given: pqrs is a parallelogram prove: pr and qs bisect each other at t

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