Carter is solving for x by the process of completing the square for the following problem:

3x^2+ 12x-24 = 0

He got to this point below:

Type the number that goes in the "?" spot:

(x+?)2 = 12

Triangle xyz has vertices x(1,3), y(0,0)

:24% of students in a class are girls. if there are less than 30 students in this class, how many students are there? how many girls are there?

The value of x in this system of equations is 1. 3x + y = 9 y = –4x + 10 substitute the value of y in the first equation: combine like terms: apply the subtraction property of equality: apply the division property of equality: 3x + (–4x + 10) = 9 –x + 10 = 9 –x = –1 x = 1 what is the value of y?