Answer:
D is the answer
Step-by-step explanation:
Sin(70+80) = sin 150.......................
<u>Given</u>:
Let the two numbers be x and y.
Two numbers multiply to be -7 and add to be -6.
This can be written in equation as,
and
<u>Value of the two numbers:</u>
Let us determine the value of the two numbers using substitution method.
Substituting 
in the equation , we get;
Simplifying, we get;
Thus, the values of x are x = 1,-7
When x = 1 , the equation becomes 
When x = -7, the equation becomes 
Therefore, the two numbers are 1 and -7
She has 10 liters left. Find 4/9 of 18 by multiplying 4/9 and 18. 4/9 of 18 is 8, so she served 8 of the 18, leaving 10 liters.
The concept of historical cost in accounting involves valuing business resources at their purchase price. This is further explained below.
<h3>What is the historical cost?</h3>
Generally, historical cost is a value of measure used in accounting that records the value of an asset on the balance sheet at its original cost when purchased by the firm.
In conclusion, valuing business resources at their purchase price is what historical cost is about.
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