Question 1197400
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Richie and Phoebe are saving money to buy a new tv. 
They need at least $510 to purchase the new TV. 
Phoebe weeds yards and Richie walks dogs to earn money. 
Phoebe charges $12 each time she weeds a yard and Richie charges $9 each time he walks a dog. 
The number of dog walks that Richie has scheduled is no more than twice the number of yards 
Phoebe has scheduled to weed. Richie will walk at least 25 dogs.
Click “show your work” below write a set of constraints to model the problem, 
with x representing the number of lawns weeded and y representing the number of dogs walked. 
(HINT: there are 3 constraint equations).
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<pre>
    12x + 9y >= 510

      y      <= 2x

      x >=0,  y>= 25.


The inequality x >= 0 is just covered by other inequalities, so it can be omitted.
</pre>

It is what you want to get.


Simply write inequalities as you read the problem - there is nothing transcendent in it.


It is REALLY EASY.