Answer:
Multiplication is commutative.
Step-by-step explanation:
Let n,m be two natural numbers.
We have to show that 
We will prove this by induction
For n = 1, we have
, which is true.
Let the given statement be true for n-1 natural numbers, that is,

Now, we have to show that it is true for n natural numbers.

which is equal to




Hence, by principal of mathematical induction, the given statement is true for all natural numbers.
Answer:
Yes it's 3/4
Step-by-step explanation:
I counted the distance between the points and your right
Answer:
a+b=b+a
Step-by-step explanation:
so 7+4=12 and 4+7=12 so addition is commutative
Answer:
390 miles
Step-by-step explanation:
30 mpg means that he gets 30 miles for every gallon.
If he has 13 gallons means that you multiply 30 by 13.
30 * 13 = 390 miles
Answer:
Perimeter is 14x+12
Step-by-step explanation:
The perimeter of a rectangle is P=2L+2W, therefore the perimeter is P=2(4x+7)+2(3x-1)=8x+14+6x-2=14x+12