When i have a negative plus a positive of the same number , what is that called ?

Solve the equation w^3 = 1,000 i honestly dont know how to punch this into a calculator pls

Table which ratio is equivalent to 3: 7? 6: 7 3: 21 24: 56 15: 30

Which statements about the system are true? check all that apply. y =1/3 x – 4 3y – x = –7 the system has one solution. the system consists of parallel lines. both lines have the same slope. both lines have the same y–intercept. the equations represent the same line. the lines intersect.