Answer:
No x-intercept
Step-by-step explanation:
When there's an equation that has no x then it will not touch the x axis.
Answer:
The width of rectangle is
or 
Step-by-step explanation:
we know that
The perimeter of rectangle is equal to

where
L is the length of rectangle
W is the width of rectangle
we have

substitute

solve for x





simplify

<em>Find the width of rectangle</em>

substitute the value of x

Convert to mixed number

Lengthof train=X
platform length=180
total distance=x+180
speed=60km/hr=60×5/18=(300/18)m/
Time =18s
Time =Distance/speed
18=X+180/(300/18
18×300=18(X+180)
300=X+180
x=300-180=120
so length of the train=120m
The two formulas i used should be in your book