in parallelogram wxyz, what is cy?\n11 ft\n15 ft\n21 ft\n23 ft

Explanation:

Step1: Use parallelogram property

In a parallelogram, the diagonals bisect each other. So, $WC = CY$. Given $WC=x + 4$ and $CY=2x - 7$, we set up the equation $x + 4=2x - 7$.

Step2: Solve for x

Subtract x from both sides: $4=x - 7$. Then add 7 to both sides: $x=11$.

Step3: Find the length of CY

Substitute $x = 11$ into the expression for $CY$. $CY=2x - 7=2\times11 - 7$. $CY=22 - 7=15$.

Answer:

15 ft