What is the reason for the fourth statement in this proof?

a. definition of collinear points

b. segment addition

c. subtraction property of equality

d. substitution property of equality

Given a: b and b: c, find a: b: c. write the ratio in simplest form. a: b=6: 10 and b: c=21: 33

The probability that a student graduating from suburban state university has student loans to pay off after graduation is .60. if two students are randomly selected from this university, what is the probability that neither of them has student loans to pay off after graduation?

Which steps could be part of the process in algebraically solving the system of equations, y+5x=x^2+10 and y=4x-10