Which description best represents the equation 25x + 50 = y

Roger and natalie travel in similar cars. roger's car drives the two miles to school in 7.5 minutes. natalie drives the same distance in the opposite direction but in only 6.5 minutes. what is true of their velocities?

The angle of a triangle are given as 6x,(x-3), and (3x+7). find x then find the measures of the angles

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