Which equation is an identity?

3(x - 1) = x + 2(x + 1) + 1

x-4x + 1) = -3(x + 1) + 1

2x+3 = 2(4x + 2) + 2

(6x – 3) = 3(x + 1) - x-2

answer: c

because if you look at the chart you can see a pattern and compare it to the question he simplify out your

but i think the formula is f(x)=6x

30 miles

step-by-step explanation:

we know that 60 seconds equals 1 minute and 60 minutes 1 hour

44 ft       60 sec     60 min     158400   ft

  *   *   =

1 sec       1 min       1 hour         hour

we know that there are 5280 ft per mile

158400   ft       1 mile         30 miles

  *   =

1   hour               5280 ft     1 hour

so in 1 hour   it can travel 30 miles

i think it might be a but you might want a second opinion