Answer: 236 kcal
Step-by-step explanation:
Given : A serving of fish contains 50 g protein and 4 g of fat.
i.e. content of protein = 50 g
content of fat = 4 g
Also, The caloric value in protein = 4 kcal/g
The caloric value in fat = 9 kcal/g
Calories in 50 g protein = (content of protein)x (caloric value in protein )
= 50g x 4 kcal/g = 200 kcal
Calories in 4 g fat= (content of fat)x (caloric value in fat)
=4 g x 9 kcal/g = 36 kcal
Then, the total calories in the serving will be :Calories in 50 g protein + Calories in 4 g fat
= 200 kcal+ 36 kcal =236 kcal
Hence, there are 236 kcal in the serving.
Answer: It is a difference of two squares, and it factors to (3x-7)(3x+7)
=============================================================
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.
Answer:
8 hours
Step-by-step explanation:
If he writes 2 pages a hour and needs 16 pages, then you would have to divide 16 by 2 which is 8.
To double check that, you can multiply 8 by 2 which is 16.
You answer is 5 hours.
Plug in each set of lengths into the Pythagorean theorem. Because the 2 sides are equal, that is a right triangle.
