Answer:
230
Step-by-step explanation:
12 sections total
5 red, 4 green, the rest black
12-5-4 = 3 sections are black
3/12 = 1/4 of the sections are black
1/4 represents the probability of landing on black for one spin
(1/4)*921 = 230.25 which rounds to 230
We expect to land on a black section about 230 times out of 921 times total.
Do the inverse operation:
P(x)+(3x-7)=0
P(x)=-3x+7
Answer:

The solution for
is all real numbers less that or equal to 36.
Step-by-step explanation:
Given expression:

To find the solution for 
Solution:
In order to solve for
, we will make sure to isolate the unknown variable
on left side alone by doing math operations on both sides of the inequality.
We have:

Multiplying both sides by 2.

The 2 on left side will cancel each other leaving
alone.
Thus, we have:

Thus, solution for
is all real numbers less that or equal to 36.
100 : 8 = 12.5
12.5 Km per liter is your answer