Answer:
z = [tex]\sqrt{35}[/tex]
Explanation:
The triangles are similar so the ratios of corresponding sides are equal, that is
[tex]\frac{z}{5}[/tex] = [tex]\frac{7}{z}[/tex] ( cross- multiply )
z² = 35 ( take the square root of both sides )
z = [tex]\sqrt{35}[/tex]
