Answer: OPTION D: 
Step-by-step explanation:
By definiton, fractions have the following form:

Where "a" is called numerator and "b" is the denominator. The numerator and the denominator are Integers.
In order to solve this exercise you need to remember de Division of fractions:

In this case, according to the information given in the exercise, you know that
of rubies are divided into 4 lots.
Therefore, in order to calculate the weight in pounds of each lot, you need to divide
by 4.
Then, you get the following result:

As you can notice, this result matches with the Option D.
Answer:
6
Step-by-step explanation:
diameter is double the length of the radius.
d= 2r
d=2(3)
d=6
The correct answer to this equation is G 1 year and 6 months. Hope this helped.
The invese switches x and y so basically
if
f(21)=z then f⁻¹(z)=21
therefor
f(z)=21 and f⁻¹(21)=z
basically solve for the value that makes the functino equal 21
21=6(x+2)-3
add 3 both sides
24=6(x+2)
divide by 6
4=x+2
minus 2
2=x
answer is 2
The answer is c). $864.00
To get this answer you find out what one-fifth of 180 is. It is 36 dollars, but the question asks for two-fifths which is 72 dollars. Then you multiply 72 times 12, for the 12 weeks. Your final answer is $864 dollars!
Hope this helps! :)