Step-by-step explanation:
Firstly, there's a typing error at (x=1)². I assume it is (x-1)². If my assumption is correct,then:
x²-2x+1-4x=x²-2x+1
x²-6x+1-x²+2x-1=0
-4x=0
x=0
Alright, lets get started.
Sophie has 5 pieces of string that are 4 yards each.
1 yards = 3 feet,
So, 4 yards =
feet
Total number of string she has = 5 piece
So, total length she has =
feet
It means she had 60 feet string in starting.
Now, She uses 3 pieces that are each 3 feet long, means
She uses =
feet
So, remaining string length will be =
feet
Means 51 feet string does Sophie have. : Answer
Hope it will help :)
B = 120 because it is in your sum