+0  
 
+5
65
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avatar+177 

does the star mean multiply or does it mean something else??

 Aug 4, 2022
 #1
avatar
+1

Yes, star means multiplication.

 Aug 4, 2022
 #2
avatar+177 
+4

But then 5*1 would just be 5, and that's not correct. Maybe the star stands for something?

waterlili  Aug 4, 2022
 #3
avatar+124594 
+2

The star is just an operation symbol

 

a * b =    5 * 1

 

So   a =  5     and  b  = 1

 

So

 

5 star  1    =

 

9a + 2b  - ab  + 5  =

 

9(5) + 2(1) - (5)(1)  + 5  =

 

45  + 2  - 5 + 5   =

 

47

 

cool cool cool

 Aug 4, 2022
edited by CPhill  Aug 4, 2022
 #4
avatar+177 
+5

Ohhhhh. Thanks! It makes so much more sense now!

waterlili  Aug 4, 2022
 #5
avatar+177 
+5

But you mean 47 right?

waterlili  Aug 4, 2022
 #6
avatar+124594 
+1

Yep   47

 

(I gotta' get some  glasses  !!)

 

cool cool cool

CPhill  Aug 4, 2022

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