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Joanna ran a mile in physical education class. After resting for one hour, her heart rate was 60 beats per minute. If her heart rate decreased by 2/5 what was her heart rate immediataly after ahe ran the mile?

Respuesta :

calculista

Let

x------> Joanna's heart rate immediately after ran the mile

we know that

[tex] (x-\frac{2}{5}*x)=60 [/tex]

[tex] \frac{3}{5}  *x=60 \\\\x=\frac{60*5}{3}  \\ \\x=100\ beats\ per\ minute [/tex]

therefore

the answer is

[tex] 100\ beats\ per\ minute [/tex]

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