Brianna’s teacher asks her which of these three expressions are equivalent to each other.

Expression A:
9
x
−
3
x
−
4
Expression B:
12
x
−
4
Expression C:
5
x
+
x
−
4

Brianna says that all three expressions are equivalent because the value of each one is
−
4
when
x
=
0
.

Brianna’s thinking is incorrect.

Expression A and C are correct because 9x - 3x = 6x and 5x + x = 6x, then -4

choice b is correct

step-by-step explanation:

we have been given the following system of linear inequalities;

we are required to graphically determine the solution to these system of inequalities. using a graphing tool, the solution is as shown in the attachment below;

i got 10.28 but that rounds up to 10.3