It is possible that the proportion of adults in Country A equal to the proportion of adults in Country B. This statement does not necessarily mean that the populations of adults in the two countries are equal. It is the proportion and not the exact population. This occurs when the ratio of the population of adults to the total population of Country A is the same as that of the ratio of the population of adults to the total population of Country B.
In this question, you're solving for x.
Solve for x:
2(4 - 8x) + 5(2x - 3) = 20 - 5x
Use the distributive property:
8 - 16x + 5(2x - 3) = 20 - 5x
8 - 16x + 10x - 15 = 20 - 5x
Combine like terms:
8 - 16x + 10x - 15 = 20 - 5x
8 - 6x - 15= 20 - 5x
-6x - 7 = 20 - 5x
Add 5x to both sides
-x - 7 = 20
Add 7 to both sides
-x = 27
Divide both sides by -1
x = -27
Answer:
x = -27
To find x:
use the formula: cos° = adajcent/hypo
cos 37° = x/ 16
answer: 12.8
The other length:
use the same formula
cos 57° = y/16
answer: 8.7
(hope this helps)
Vertical angles are congruent.
10x+60=30x-20
20x=80
x=4
All four angles add up to 360 degrees.
360-100-100=360-200=160
160/2=80
100, 100, 80, 80
Let 
denote the number of packages brought by customer 
. If, for instance, 
customers are in line, then the total number of packages is 
, and
since the number of packages brought by any customer is independent from the number of packages brought by any other.
a. 
is the probability that a total of 3 packages are waiting to get wrapped from among a total of 3 customers. This means each customer must have exactly one package. So
b. 
is the probability that a total of 11 packages are brought by 4 customers. The only way for there to be 11 packages is if 3 customers bring 3 packages and the last 1 brings 2. There are 
ways this can happen, so
