The value of the missing length is 20
Let the missing length be x
From Parallel lines and transversal theorem, we have that
If three or more parallel lines intersect two transversals, then they cut off the transversals proportionally.
Then, we can write that

∴ 
x = 20
Hence, the value of the missing length is 20
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Answer:
I'm pretty sure its A
Step-by-step explanation:
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Answer:
367 19/27
Step-by-step explanation:
Use symbolab bruv, its easy.
Answer:
C. f(-1) =12
Step-by-step explanation:
f(x)= 3x^2+9
Let x=-1
f(-1) = 3(-1)^2 +9
= 3(1)+9
= 3+9
= 12
f(-1) =12
Answer:
b
Step-by-step explanation:
because we can not some times change the places in addition so b is the correct answer