+0  
 
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623
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Sandy cut out 2 squares and 7 circles from a piece of cardboard. The length of the sides of each square was x inches and radius of each circle was y inches. The expression below shows how many more square inches of cardboard Sandy used for making the circles than the squares:

7πy2 - 2x2

What does the term 7πy2 in the expression represent?

The total area of 7 circles

The total area of 22 circles

The total area of all the shapes

The total area of all the squares

 Jul 19, 2014

Best Answer 

 #6
avatar+8259 
+6

I estimate that it is the area of 7 circles.

 Jul 20, 2014
 #1
avatar+121048 
+3

DS and rosala.......I think rhat both of you might be able to do this one........give it a try!!!!

 

 

 Jul 20, 2014
 #2
avatar+8259 
0

First of all, is this π pi?

 Jul 20, 2014
 #3
avatar+11907 
+3

yes that is used to represent pie!

 Jul 20, 2014
 #4
avatar+11907 
+3

CPhill im a lil confused in this one!

 Jul 20, 2014
 #5
avatar+8259 
+3

I used the calculator.

{piy=-(((sqrt(2)*x)/sqrt(7))), piy=((sqrt(2)*x)/sqrt(7))}

 Jul 20, 2014
 #6
avatar+8259 
+6
Best Answer

I estimate that it is the area of 7 circles.

DragonSlayer554 Jul 20, 2014
 #7
avatar+121048 
+3

Think about this guys.....what's the "formula" for the area of a circle with a radius of "r"  ???

What would be the way to find out the area of 7 of these circles???

 

 

 Jul 20, 2014
 #8
avatar+121048 
0

You're correct DS......7*pi*y^2   would be the answer for the area of 7 circles !!!

good job !!!

 

 Jul 20, 2014
 #9
avatar+11907 
+3

Good job DS!

Btw CPhill i too was thinking the same answer but just got a lil confused!

 Jul 20, 2014
 #10
avatar+8259 
0

Thanks, Chris! And thanks, rosala! I just thought it back and forth, and I read it millions of times. And that's how I think I got the answer. But, thanks, CPhill!

 Jul 20, 2014

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