The right answer is Option A.
Step-by-step explanation:
Given, 
Heart rate goal = I
Heart rate reserve = H
70% of H = 
Resting heart rate = R
According to given statement, 
70% of heart rate reserved is added to resting heart rate to calculate heart rate goal, therefore, 
I = R + 0.7H
I=R+0.7H represents the given situation.
The right answer is Option A.
Keywords: linear expression, addition
Learn more about addition at:
#LearnwithBrainly
 
        
             
        
        
        
Iit is the first choice where it says the side length of the white square is b -a....
        
             
        
        
        
Answer: 3
Step-by-step explanation:
Mean simply means average. To calculate mean,we add together all the numbers given and divide them by the amount of numbers.
The Mean here will be:
= [8 +(-10) + 7 + 10 + (-3) + 6]/6
=18/6
= 3 
The mean is 3