They removed 4.5 tons in eight
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:
A
Step-by-step explanation:
A triangle has 180 degrees.
So, 10 + 145 + x = 180
x = 25
This means that the angles in the triangle are:
10, 145, and 25
Using this information, only A has the same values so it is the answer
Answer:
sorry I need this for asking
Answer:
-2, compliments
Step-by-step explanation:
The computation of the cross elasticity of demand is shown below:
Given that
(P1, Q1) = (7, 25)
(P2, Q2) =(5,50)
Now here we use the mid-point formula for determining the cross price elasticity
= [(Q2 - Q1) ÷ (P2 - P1)} × [(P1 + P2) ÷ (Q1 + Q2)]
= [(50 - 25) ÷ (5 - 7)] × (5 + 7) ÷ [(25 + 50)]
= -2
Hence, the cross-price elasticity is -2
It is negative so these are complementary goods
Hence, the correct answer is -2, compliments