Keeps your heart rate up but takes some of the impact stress off your body. builds endurance, muscle strength and cardiovascular fitness. helps maintain a healthy weight, healthy heart and lungs. tones muscles and builds strength.
Answer:
Explanation:
If you multiply (x - k)(x + k), you get 
which is equal to 
. Now you can see that 
must be equal to 
which is equal to 
. Now we just need to solve 
. The final answer is 
.
A standardized test taken by most high school Juniors and Seniors in order to qualify for college admittance and scholarships
I think the answer is C.40
