Integers are closed under subtraction.
Answer: 
Step-by-step explanation:
Given: A tourist first walked 17km with a speed of v km/h.
Since 
therefore, 
Let
be the time he walked with speed v.
then 
Also he hiked 12 km uphill with the speed that was 2 km/hour less than his original speed.
Let
be the time he hiked 12 km,
Then 
The total time for the whole trip is given by:-

Substitute the values of
and
in the equation, we get

Independent because the ratio of the second cube is the same (1:6), and it isn't affected by the result of the first cube
Answer:
33^2
Step-by-step explanation:
3 x 5= 15
15+18=33
33^2 because there is two triangles your adding to get the answer
Answer:

Step-by-step explanation:
Formula to find radius:




<em>hope this helps......</em>