Julie drives 90 mi to Grandmother's house. On the way to Grandmother's, Julie drives half the distance at 20 mph and half the distance at 70 mph . On her return trip, she drives half the time at 20 mph and half the time at 70 mph .
Part B:
How long does the return trip take?
I would really appreciate a step by step to learn this portion. I dont think I quite grasp the idea of this part
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Julie drives 90 mi to Grandmother's house. On the way to Grandmother's, Julie drives half the distan...
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