The only time you can be so certain that you have picked 2
brown socks is when there are no more white socks and black socks. This means
that to be 100% sure that you have picked 2 brown socks, you must pick all 12
white socks and all 18 black socks and only then you can pick 2 brown socks
without looking. Therefore the total number of socks that should be picked is:
Total number of socks = 12 white socks + 18 black socks + 2
brown socks
Total number of socks = 32 socks
A total picking of 32 socks is required to be certain
without looking that 2 brown have already been chosen.
Answer:
-10
Step-by-step explanation:
Use PEMDAS (Parenthesis, Exponents, Multiplication/Division, Addition/Subtraction)
8 + (-2) · 9
8 - 18
-10
Answer: 0.8 radians
Step-by-step explanation:
To solve this exercise you must apply the formula shown below:
Where S is the arc lenght, r is the radius of the circle and 
is the central angle in radians.
Solve for the central angle:
Now, when you susbtitute the value of the arc length and the radius, you obtain that the central angle is:
Answer:
7x
Step-by-step explanation:
This quantity is the same as obtained when dividing 14x by 2: 7x
