Y=2x-4 and x=12 then y=

Y = 20

Step-by-step explanation:

Because x = 12 we do:

2(12) - 4.

2 x 12 = 24.

24 - 4 = 20.

I hope this helps :)

answer: 140

step-by-step explanation:

so just add all then it will be your answer but i am not pretty sur eif it is but hope this i am here to people

4 and 5)16.97 or 12√2

6)15.59 or 9√3

7)y = 15.59 or 9√3     x =27

8)17.80