Answer:
hi
Step-by-step explanation:
have a nice day
Alright.
So let's say the number of adults is x.
Therefore, the number of boys is 7x + 1.
And then the total amount of girls is 3.5x + 0.5
So then:
x + 7x + 1 + 3.5x + 0.5 = 82
11.5x + 1.5 = 82
11.5x = 80.5
x = 7
So now we can figure out the number of male and female students.
Male students = 7x + 1
7*7 + 1
49 + 1
50
Male Students = 50
Female students = half of 50
50/2 = 25
Female Students = 25
x^2 - 4
------------------------------
x + 7 | x^3 + 7x^2 - 4x - 28
x^3 + 7x^2
------------------
0 - 4x - 28
-4x - 28
-------------
0
Now we know that
x^3 + 7x^2 - 4x - 28 = (x^2 - 4)(x + 7)
x^2 - 4 can be factored since it is the difference of two squares.
x^2 - 4 = (x + 2)(x - 2)
The complete factoring is:
x^3 + 7x^2 - 4x - 28 = (x +2)(x - 2)(x + 7)
Answer:
The answer to your question is: 128 days
Step-by-step explanation:
Data
original mass = 21 g
after 45 days = 17.3 g
Process
mass transform = 21 - 17.3 = 3.7 g
21 g ----------------------- 100 %
3.7 g --------------------- x
x = (3.7 x 100) / 21
x = 17.61 %
17.61 % ------------------- 45 days
50% -------------------- x
x = (50 x 45) / 17.61
x = 127.8 ≈ = 128 days
