Answer:
Answer is C
Step-by-step explanation:
ΔACD is similar to ΔBCD by AA similarity theorem
AD/AC = BD/BC
x/5 = 4.2/6
6x = 21
x = 3.5
Hope this helps! ;)
-(20+z)/y = x
-20=xy +z
Subtract z from each side
-20 -z = xy+z-z
-20 -z = xy
Divide each side by y
(-20 -z)/y = xy/y
Factor out a negative
width= w
length = l=w+5
Area = l * w
104 =(w+5) * w
w2 +5w -104 =0
(w+13)(w-8)=0
w=13 and w=8
so width =8
length=13
[2+(6times8)]-1
= [2+(6 * 8)] -1
= [2+(48)] -1
= 50 -1
= 49
