Question

While riding her bike to the ocean and back home 6 times, Melissa timed herself at 42min, 46min, 52min, 57min, 59min, and 55min. She had set a goal of averaging 51 minutes for her rides. How many minutes will she need to spend on her seventh ride to attain her goal?

Answer 1

She needs a time of 61 min on her 8th ride

in order to average 51 min for the 8 rides

Explanation:

+%28+46+%2B+48+%2B+50+%2B+43+%2B+54+%2B+54+%2B+52+%2B+t+%29+%2F+8+=+51+

+347+%2B+t+%29+%2F+8+=+51+

+347+%2B+t+=+408+

+t+=+61+