Mrs. France, a seventh-grade math teacher, is grading papers. Three students gave the following responses to the same math problem: Student one: −1/ 2 Student two: - 1/2 Student three: −(1/2) On Mrs. France's answer key for the assignment, the correct answer is −0.5. Which student answer(s) is (are) correct and why?

student 1

Step-by-step explanation:because he is the only one that doesnt have a half .

x = -3

y = -18

step-by-step explanation:

to solve by substitution, substitute one variable and solve for the other. then substitute again to find the remaining variable.

x-1/3(3x-9) = -3 since y=3x-9 substittute y.

x-1/3(3x-9)=-3

x + x +3 = -3

2x+3=-3

2x+3-3= -3-3

2x=-6

x=-3

substitute again into y=3x-9

y=3(-3)-9

y=-9-9

y=-18

step-by-step explanation:

a'(12.5,11.25)

slope=(y1-y2)/(x1-x2)