Answer:
Step-by-step explanation:
the expression we have is:

To find an equivalent expression, it would be helpful to express 1/3 so that it has a 12 in the denominator:

so we substitute this:

and now we have 1/12 in both terms :

so we can factor it (we take it out of each term: in the first we are left with -x and in the second with -4):
the equivalent expression is:
Answer is D.Don't take out the square
If she rides at 12 miles per hour, we know that 45 minutes is three quarters of an hour, therefore just workout:
3/4 x 12 = 9
So she would travel 9 miles in 45 minutes.