Answer:
d
Step-by-step explanation:
Answer: It is a difference of two squares, and it factors to (3x-7)(3x+7)
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Explanation:
We can write the 9x^2 as (3x)^2 since
(3x)^2 = (3x)*(3x) = (3*3)*(x*x) = 9x^2
The 49 can be written as 7^2 because 7^2 = 7*7 = 49.
This means 9x^2 - 49 is the same as (3x)^2 - 7^2. We have a difference of two squares.
The difference of squares factoring rule is
a^2 - b^2 = (a-b)(a+b)
which we have a = 3x and b = 7 in this case
So,
a^2 - b^2 = (a-b)(a+b)
(3x)^2 - 7^2 = (3x-7)(3x+7)
9x^2 - 49 = (3x-7)(3x+7)
Side note: This is the same as (3x+7)(3x-7). We can multiply two numbers in any order.
Note that the measurements of the side of the squares are the same.
Area = base x height
Area = length x width
The area given is 400
Root 400 to get the length of the sides
√400 = 20
20 in. is your side measurement
hope this helps
Answer:
bro the co ordinates are in the picture itself
Answer:
B. 2(n + 24)
Step-by-step explanation
you need to find the sum of n and 24 first so you put it in brackets. To multiply by two just put 2 on the outisde of the brackets.
Hope this helps
