The 2 triangles are congruent therefore
9x-1 = 10x-10
x= 9
so 80* 2 = 160
angle cad measures 160 degrees
Isolate the variable by dividing each side by factors that don't contain the variable.
x=40
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It’s C
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Step-by-step explanation:
length-10x
width-x
perimeter-2(l+b)
66=2(10x+x)
66-2=10x+x
64=11x
x=11/64
lenght-11
width-64
Answer:

note that -11 itself is not included. the circle is empty, not filled