Final answer:
Without specific relational information about how the algebraic expressions correspond to the sides of the parallelogram, the value of y cannot be determined. For the linear equations, options A, B, and C are all linear equations since they can be written in the form y = mx + b.
Step-by-step explanation:
To find the value of y if the quadrilateral is a parallelogram, we would need to apply the properties of a parallelogram. One property is that opposite sides are equal in length. If we are given specific algebraic expressions for the sides, we could set the expressions for the opposite sides equal to each other and solve for y. However, the provided information contains different expressions (2x + 9, 106, 3y + 19, and x + 11) without specifying which sides they represent or how they relate to the parallelogram. Without this relational information, we cannot determine the value of y.
As for the linear equations from Practice Test 4, an equation is linear if it can be written in the form y = mx + b, where m is the slope and b is the y-intercept. The provided equations A, B, and C are all linear because they can be written in this form.