Answer:
The answer is D. pairs 1 and 3
We have been given an expression 
. We are asked to choose the expressions, which are equivalent to our given expression.
Using exponent property 
, we can rewrite our given expression as:
Upon looking at our given choices, we can see that option D is the correct choice.
Let us simplify our given expression.
Upon cancelling out 
from numerator and denominator, we will get:
Using exponent property , we will get:
Therefore, option B is a correct choice as well.
Answer: 300 calories
Step-by-step explanation: let us assume that moving at any speed expends approximately 100 calories per mile. Moving a less-minute mile will burn a few more calories than moving a high-minute mile because of the added effort. Since the minutes for the 3 scenarios are the Same, then we can conclude that he is burning calorie at the same level in which the total equal to 300 calories
The first answer is the correct one
<span>Center(0,0)
a^2=16
a=4
b^2=9
b=3
c^2=a^2+b^2=16+9=25
c=√25=5</span>
