While exercising, a person's recommended target heart rate is a function of age. the recommended number of beats per minute, y , is given by the function y=f(x)=−0.85x+187 where x represents a person's age in years. determine the number of recommended heart beats per minute for your age. show each step in the process of this calculation.

174.25

Step-by-step explanation:

To solve this equation I will assume you are 15 as this is a High School level problem.

1. Plug in 15 for x

-.85*15+187

2. Solve

-.85*15=-12.75

-12.75+187=174.25

geometry: triangles

solvers

lessons

answers archive

call the larger triangle abc

then the smaller triangle cde is similar to abc (all angles are equal, aaa).  

ab is the side that is 36, and we wish to find de, the side corresponding to ab

area_cde = area_abc - area_cde --> area_abc / area_cde = 2

let x=length of de

ratio of areas = (ratio of sides)^2

+2+=+%2836%2fx%29%5e2+

+2+=+1296%2fx%5e2+

++x%5e2+=+1296%2f2+=+648+

25.45584