if your friend's doctor wants her target heart rate range to be between 143 and 170, and her average resting heart rate is 62, what us her age? how did you backtrack through these equations to find her age?

Step-by-step explanation:

I was stretching and then I farted very loud

Best answer that i found on yahoo ok   set :   x= length of 2nd piece in cm  x- 3= length of 1st piece in cm  x-4= length of 3rd piece in cm  then since you know they all came from the 20 cm ribbon you add them together and set them equal to 20x+ x-3 +x-4 = 20  3x - 7= 20  3x= 27  x= 9  the shortest piece is the third piece which is x- 4  x-4  9-4 = 5  the length of the smallest piece is 5 cm.  the other lengths are  9 cm  6 cm