To complete a train track, 66 wood ties are needed at one end, and 129 wood ties are needed at the other end. the track builders want to have a few extra ties in case any split or have knots in them. they put in an order for enough ties to finish the train track.

which statement is correct?

a.
the builders should order the exact number of ties they need which is 66 and 129.

b.
the builders should estimate that they need 70 + 130 ties and order 200 ties.

c.
the builders should estimate that they need 60 + 130 ties and order 190 ties.

fa tha first one you gonna add y to both sides

it look like this

x-y+y=6+y

x=y+6

therefore your answer is

x =y+6

fa tha second one

you gonna flip tha equation

it gonna look like x-4y=y

then add 4 to both sides

it gonna look like tha

x-4 +4 =y +4

so therefore tha answer is x=y+4

step-by-step explanation:

step-by-step explanation:

1. practice, practice & more practice

2. review errors

3. master the key concepts

do not try to memorise the processes.

4. understand your doubts.

5. create a distraction free study environment

6. create a mathematical dictionary

7. apply maths to real world problems.