Divizorilor naturali ai numărului 15 es 3 y 5. Suma de 3 y 5 es 8.
Answer:
A. 7
Step-by-step explanation:
Answer: 80%
Explanation 4/5=.8
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.
Weight of a puppy in a local pet store = 72 ounces
Given ,
1 pound = 12 ounces
Then , 72 ounces will be equal to :
= 72 ÷ 12
= 6
Therefore , the weight of the puppy is 6 pounds .