+0  
 
+1
60
1
avatar+150 

help asap

angiesalazar1942  Aug 16, 2018
 #1
avatar+91019 
+2

Look  at "C'

 

If we multiply   25 * 1 hour  + 40   we get  1 * 25  + 40  = 25  + 40  = 65

If we multiply 2 * 2 hours + 40  we get 2 *25  + 40  = 50 + 40  = 90

 

This seems to  be the rule....check it yourself for 3 hours, 4 hours and 5 hours to see that this rule is correct....!!!

 

cool cool cool

CPhill  Aug 16, 2018
edited by CPhill  Aug 16, 2018

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