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xxMikexx [17]
3 years ago
12

Medical researchers have determined that for exercise to be beneficial, a person’s desirable heart rate, R, in beats per minute,

can be approximated by the formulas where a represents the person’s age. If the desirable heart rate for a man is 135 beats per minute, how old is he?
Mathematics
1 answer:
MA_775_DIABLO [31]3 years ago
7 0

Answer:

40 years old

Step-by-step explanation:

R, in beats per minute, can be approximated by the formulas , where a represents the person's age.

R= 143 - 0.65a for women

R= 165 - 0.75a for men,

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