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What is 45 over 20 = 18 over p

 Mar 16, 2016

Best Answer 

 #2
avatar+1491 
+14

All this is some simple cross multiplication, I'm sure you know how but if not I'll demonstrate.

 

We start with:

 

45 = 18

20     p

 

Multiply 45 by p and 18 by 20:

 

45p=360

 

Use algebra and....

 

p=8

 

Hope this helped c:

 Mar 16, 2016
 #1
avatar+8259 
+10

45/20=18/p  p=8

 Mar 16, 2016
 #2
avatar+1491 
+14
Best Answer

All this is some simple cross multiplication, I'm sure you know how but if not I'll demonstrate.

 

We start with:

 

45 = 18

20     p

 

Multiply 45 by p and 18 by 20:

 

45p=360

 

Use algebra and....

 

p=8

 

Hope this helped c:

HighSchoolCalculus Mar 16, 2016
 #3
avatar+13 
+10

45/20=18/p

p=8

 Mar 16, 2016
 #4
avatar+8259 
+5

Good job! +5 stars for you!

DragonSlayer554  Mar 16, 2016

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