28 km
We calculate the circumstance by multiplying the diameter by Pi. Therefore to get the diameter we need to devide the circumstance by Pi
I think the root of "3x + 1 = 7" is 2...
I hope that 2-1 means 21.
DE + EF = DF
4x + 10 + 21 = 9x - 15
4x + 31 = 9x - 15
31 = 9x - 4x - 15
31 = 5x - 15
46 = 5x
x = 9 1/5 = 9.2
You want 9x - 15
9*9.2 - 15
82.8 - 15
67.8 <<<<< answer.
If I have given the wrong meaning to 2-1 (which could mean 1) leave another note and I will correct my work.
44 that's a tricky question at first i thought it was -1 lol