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Elina [12.6K]
2 years ago
6

Which expressions are differences of squares?

Mathematics
1 answer:
Lina20 [59]2 years ago
8 0
Difference of 2 perfec squares is
(a^2)-(b^2)




if the exponents are both even and the coeficient (the number in front) are perfect squares, then it is difference t 2 perfect squares

first one
8 is not perfect square


2nd one
(4e^4)^2-(9g^2)^2


third
25 is odd, so it cannot be split up into 2 nice numbers

4th
(11m^9)^2-(3n^5)^2
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notka56 [123]

Answer:

The area of the circle is 50.24 mm ²

Step-by-step explanation:

To solve this exercise we need to use the area formula of a circle:

a = area

r = radius = 4mm

π = pi = 3.14

a = π * r²

a = 3.14 * (4mm )²

a = 3.14 * 16mm ²

a = 50.24 mm ²

The area of the circle is 50.24 mm ²

6 0
2 years ago
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8 0
3 years ago
What is the greatest number of 19 cent stickers that can be purchased with a $20 bill, assuming there is no sales tax?
user100 [1]

Answer:

105

Step-by-step explanation:

First, you are going to convert dollars to cents. Since there are 100 cents in a dollar, multiple $20 by 100. Now you should have 2,000 cents. Now all you have to do is divide by 19, the cost of the stamps, and you should get 105.26. Because you can't by part of a stamp your answer would be 105.

4 0
2 years ago
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Maksim231197 [3]

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Step-by-step explanation:

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xenn [34]

Answer:

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225 = c^2

c = 15

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