Answer:
21. 34
22. 35
22. 80
Explanation:
21. ac=dc so..
4x+5=3x+8
simplify and you get...
x=3 then you plug it in to the formula ac+dc to get ad
4(3)+5+3(3)+8
17+17=34
22. fcd-bcd=fcb
plug in the angles
130-95=fcb
35=fcb
23. fca=ecd and acd is 180
if fca is 50, so is ecd
50+50= 100
180-100=80
so fce=80