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Anonymous users2024-02-06He had a heart rate of 75 beats per minute before exercising.
Suppose his heart beats x times per minute before exercising, according to the title, his heart beats 130 times per minute after exercising, which is 55 times more than before exercise.
The columnar formula is: x+55=130
Solution: x=75
So, he had a heart rate of 75 beats per minute before exercising.
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Anonymous users2024-02-051. The athlete's heartbeat is 60-100 times per minute, and the athlete's heartbeat is slightly slower than that of a normal person.
2. Heartbeat, as the name suggests, is the beating of the heart. The right atrium receives venous blood throughout the body, which is pumped out from the pulmonary artery through the right ventricle, and the pulmonary artery is venous blood flowing at this time, and through the exchange of gas in the lungs, it becomes oxygen-rich arterial blood, which is sent from the pulmonary vein to the left ventricular atrium, and then through the aortic pump of the left ventricle to various tissues and organs of the whole body to meet the needs of its normal physiological activities.
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Anonymous users2024-02-04The heart beats before exercise is 75 beats per minute.
Solution: Let the heart rate be x times per minute before exercise.
Then according to the meaning of the question, the equation can be listed as, 130 = x + 55x = 130-55
x = 75, i.e. the heart rate before exercise is 75 beats per minute.
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Anonymous users2024-02-03Solution: Let his heart beat X times per minute before exercising.
+55 before exercise = after exercise.
x+55=130
x+55-55=130-55
x=75 I this is not simplified. You can simplify.
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Anonymous users2024-02-02Solution: Heartbeat x times per minute before exercise.
Quantitative relationship: heartbeat per minute before exercise + 55 = heartbeat after exercise.
x+55=130
x+55-55=130-55
x=75
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Anonymous users2024-02-01Solution: Suppose his heart beats x times per minute before exercising.
Heartbeat before exercise + 55 = heartbeat after exercise.
x+55=130
x+55-55= 130-55
x=75
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Anonymous users2024-01-31Solution: Set the heart rate x times per minute before exercising.
x+55=130
x=130-55
x=75
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Anonymous users2024-01-30Solution: Let his heart beat x times per minute.
x+55=130
x＝130-55
x 75: Remember to align the equal signs.
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Anonymous users2024-01-29Solution: X times per minute before exercising.
55+x=130
Solution: 55+x-55=130-55
x=75
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Anonymous users2024-01-28130-55 = 75 (times).
A: He had a heartbeat of 75 beats per minute before exercising.
A normal person's heart beats about 60,100 times a minute.
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