Phyllis paid $408 for new wall-to-wall carpeting in her living room. The carpeting was $12 per square yard, plus a $120 installa
1 answer:
You might be interested in
Answer:
Step-by-step explanation:
GIVEN: In a mile race, Janet covered the first
miles at a constant rate. She then speed up and rode her bike the last
miles at a rate that was
miles per minute faster. Janet's overall time would have been
minutes faster had she ridden her bike the whole race at the faster pace.
TO FIND: What was Janet's average speed (in miles per minute) for the whole race?
SOLUTION:
let the speed of Janet in first
speed of Janet's bike in last
total time taken by Janet,
Time taken if Janet rides whole race at faster pace
As, Janet's overall time would have been faster had she ridden her bike the whole race at the faster pace.
on solving we get
Average speed
Average speed
Therefore average speed of Janet was