# During exercise, the recommended maximum heart rate in beats per minute is modeled by the formula, M = 176 – 0.8A, where M is the maximum heart rate and A is the person’s age. Solve the formula for A. At what age would you have a recommended maximum heart rate in beats per minute of 125? (1 point)

A) 40 years

B) 50 years

C) 25 years

D) 45 years

Is it 25 years?

## Its 50

## Read the multiple choice answers. 52 is not there, right? Since you got 50.94, The number of whole years is 50. So, your answer is 50.

## @Lilly is a liar

## The equation is M=176-0.8A, where M=maximum heart rate (in beats/minute) and A=Age. The question is asking you to find the age if the maximum heart rate (in beats/minute), or M, is 125. So, just plug in the value of M, or 125, and solve the equation.

## Can you show me the equation??

## Do minus 176-.08 then divide it by 125 or??

## 50 yrs?

## Or, as an easier way, subsitute A in the equation with each answer. Then see which equation equals 125 or around 125.

## ok thanks ! I got 50.94 is this right? SO 52 years?

## M=176-0.8A

125 = 176 - 0.8A