Answer:
22x^2 -10xy + 12x
Step-by-step explanation:
To add and subtract polynomials, combine only like terms. When doing it vertically, stack polynomials and line up the same bases and exponents. Once this is done, simply add and subtract the coefficients.
10x^2 + 12xy + 4x
+ 12x^2 -22xy + 8x
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22x^2 -10xy + 12x
Here we added 10 + 12 = 22, 12 + -22 = -10 and 4 + 8 = 12.
It's choice D.
Adding up the constants (8 and 4) gives you 12
Adding up the coefficients (3 and 7) gives you 10
The value of the cosine of angle 
is 1.
Given a point 
that is a terminal arm of an angle in standard position, by trigonometric relations we have the following expression for the cosine:
(1)
Where:
- - Angle measure, in sexagesimal degrees.
- Horizontal position of the point of the terminal arm, no unit.
- Vertical position of the point of the terminal arm, no unit.
If we know that 
and 
, then the cosine of the angle is:
The value of the cosine of angle is 1.
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Answer:
8.25*10^24
Step-by-step explanation:
1000*.25= 250 (this converts the .25 into milliliters)
250(3.3 * 10^22)
= 8.25*10^24
