60 I think, because it’s base times height divided by two
You can change them into fractions with the same denominator: multiply 3/4 by 3 and 2/3 by 4
3/4 = 9/12
2/3 = 8/12
You could also convert them to decimals.
3/4 = 0.75
2/3 = 0.667
3/4 is greater than 2/3

taking 2 to the other side ⇒

= 5 x 2
3x=10
taking 3 to the other side ⇒ x =

x = 3.34
AC= √CD^2+AD^2
AC= √AB^2+BC^2
Those two are true
See explanation in photo below
Good luck