SOLUTION: An elevator can carry up to 2,500 lbs. Suppose the weight of an average adult is 150lbs. and a child is 70lbs. At most, how many average- sized adults can safely ride the elevator

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Question 678904: An elevator can carry up to 2,500 lbs. Suppose the weight of an average adult is 150lbs. and a child is 70lbs. At most, how many average- sized adults can safely ride the elevator at the same time if there are three children? show your work.
Found 2 solutions by unlockmath, jim_thompson5910:
Answer by unlockmath(1688) About Me  (Show Source):
You can put this solution on YOUR website!
Hello,
Let x represent the number of adults, therefore the following equation can be set up:
150x+3(70)=2500
Subtract 210 and divide by 150 to get:
x=15.27
Now we know 15 adults can safely ride in the elevator.
Make sense?
RJ
www.math-unlock.com

Answer by jim_thompson5910(35256) About Me  (Show Source):
You can put this solution on YOUR website!
Let x = number of adults

3*70 + x*150 <= 2500

210 + 150x <= 2500

150x <= 2500-210

150x <= 2290

x <= 2290/150

x <= 15.266

x <= 15

So up to 15 adults can ride the elevator.