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Sisters Helen and Anne live 332 miles apart. For Thanksgiving, they met at their other sister's house partway between their homes. Helen drove 3.2 hours and Anne drove 2.8 hours. Helen's average speed was 10 miles per hour faster than Anne's. Find Helen's average speed and Anne's average speed.

 Feb 4, 2020
 #1
avatar+20216 
+2

Helen drove   3.2 hrs   *   x  m/hr

Anne drove   2.8 hrs * ( x-10) m/hr     these should sum to 332

 

3.2 x   + 2.8 (x-10) = 332       solve for'x'. Helen's speed       then  x-10 = Anne's speed

 Feb 4, 2020
 #2
avatar+11277 
+1

Sisters Helen and Anne live 332 miles apart. For Thanksgiving, they met at their other sister's house partway between their homes. Helen drove 3.2 hours and Anne drove 2.8 hours. Helen's average speed was 10 miles per hour faster than Anne's. Find Helen's average speed and Anne's average speed.

laugh

 Feb 4, 2020

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