jonathan went for a jog. every time he stops to tie his shoelaces, his jog lasts 2 1/2 minutes longer. if he stops to tie his shoelaces four times, how much longer does his jog take

Respuesta :

2.5=2 1/2
2.5*4=10
10+r=j
r=time he actually ran
j=total time of jog

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