Answer:
is equivalent to 
Step-by-step explanation:
The given expression is :
.
We collect LCM in both the numerator and the denominator to obtain:

Change to the normal division sign;

Multiply by the reciprocal of the second fraction:

Cancel out the common factors

Therefore
is equivalent to 
Answer:
7
Step-by-step explanation:
63 = 7*9
= 7*3*3
These are all prime numbers
7 is the largest
13 vehicles (at least) will be needed to transport the students. 18x3= 54+10= 64\5= 12.8. Round 12.8 to the nearest while number is 13
Its helpful because it gives you the number to put in and to find the unit rate