Answer: 5
Explanation:
It is given that the two diagonals of a parallelogram bisect each other. Using this information, it is given that the parts of each line are congruent to each other (12 = x + 3, 9 = 2y -1).
We are asked to find y, so we will use this information and the equation we created with this information to solve.
Given:
9 = 2y - 1
Add 1 to both sides of the equation:
10 = 2y
Divide both sides of the equation by 2:
5 = y