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-5
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avatar+73 

Write, solve, and graph an inequality for the followimg:

 

Jessica wants to order some dvds from Amazon. Each dvd costs $15.99 and shipping for the entire order is $9.99. Jessica can spend no more than $100.

 May 17, 2016

Best Answer 

 #1
avatar+128731 
+5

Let x be the greatest  number of DVDs that she can order.......then.....

 

x *(cost of each DVD) +  shipping cost   ≤ 100   ....so we have

 

x * 15.99 + 9.99 ≤ 100      subtract 9.99 from each side

 

x * 15.99  ≤ 90.01           divide both sides by 15.99

 

x  ≤  90.01 / 15.99  =   about 5.6 DVDs   ....but  she can't quite afford 6, so she must settle for 5

 

Here's the graph :     https://www.desmos.com/calculator/hreijk0scn

 

 

cool cool cool

 May 17, 2016
 #1
avatar+128731 
+5
Best Answer

Let x be the greatest  number of DVDs that she can order.......then.....

 

x *(cost of each DVD) +  shipping cost   ≤ 100   ....so we have

 

x * 15.99 + 9.99 ≤ 100      subtract 9.99 from each side

 

x * 15.99  ≤ 90.01           divide both sides by 15.99

 

x  ≤  90.01 / 15.99  =   about 5.6 DVDs   ....but  she can't quite afford 6, so she must settle for 5

 

Here's the graph :     https://www.desmos.com/calculator/hreijk0scn

 

 

cool cool cool

CPhill May 17, 2016
 #2
avatar+73 
+1

Hey thanks for the info CPhill!

GAMEMASTERX40  May 17, 2016

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