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The area of a circle is approximately 3.14 times the radius squared. Which of the following expressions is a correct way to write this, if the radius is x?


A. (3.14x)^2


B. 2(3.14)x


C. 3.14x^2


D. x(3.14)^2

 

Translate the difference of five squared and n into symbols.


A. 5^2 ÷ n


B. 5^2x n


C. 5^2- n


D. 5^2+ n


Merrill bought m notebooks for $2.50 each and n pens for $1.25 each. Which expression best shows how much she spent?


A. 2.50m + 1.25n


B. 3.75(m + n)


C. 2.50 + m + 1.25 + n


D. mn + (2.50)(1.25)

 Oct 16, 2019

Best Answer 

 #1
avatar+190 
+2

1. C, you are only squaring the x and multiplying it by 3.14, not anything else

2. C, to find the difference of two things, you subtract one from the other

3. A, you are buying m notebooks and each is 2.50, so the total is 2.50m and the same goes for the pens but n and 1.25 instead.

 Oct 16, 2019
 #1
avatar+190 
+2
Best Answer

1. C, you are only squaring the x and multiplying it by 3.14, not anything else

2. C, to find the difference of two things, you subtract one from the other

3. A, you are buying m notebooks and each is 2.50, so the total is 2.50m and the same goes for the pens but n and 1.25 instead.

Oofrence Oct 16, 2019

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