Question

I need help with this pls :)

Answer 1

z = 12

Explanation:

The two marked inscribed angles intercept the same arc, so have the same measure.

__

∠ADB = ∠ACB

7z -4 = 5z +20 . . . . . . substitute degree measures

2z = 24 . . . . . . . . add 4-5z

z = 12 . . . . . . . divide by 2