1. Find whether a rate of 125 beats is within the training range. Write equations to find the low and high end of the training range. Then determine whether 125 beats per minute is within that range. Jan has a maximum heart rate of 215 beats per min. Explain whether a rate of 125 beats per min is in the training range of between 60% and 75% of the maximum rate. Write an Equation COURSE 3 LESSON 6-7 6-7

2. (continued) Write an Equation COURSE 3 LESSON 6-7 low end of training range is 60% of 215 Words Equation Let = low end of training range. 0.60 of 215= = 0.60 215 = 129 Simplify. high end of training range is 75% of 215 Words Equation Let h = high end of training range. 0.75 of 215 = h = 0.75 215 = 161.25 161 Simplify. h 6-7

3. (continued) Write an Equation COURSE 3 LESSON 6-7 Jan’s training rate should be between 129 and 161 beats per min. 125 beats per min is too low. It is not within the training range. Round 215 to 220 to estimate the reasonableness of the solution. 60% of 220 = 0.60 220 = 132 75% of 220 = 0.75 220 = 165 Since 132 is close to 129 and 165 is close to 161, the calculated training range is reasonable and Jan’s rate is too low. 6-7

4. Write an Equation A house buyer wants to bid between 90% and 98% of the asking price. The asking price is $210,000. Find the expected low and high bids. COURSE 3 LESSON 6-7 $189,000; $205,800 6-7