42°
Step-by-step explanation:
(Angles in linear pair)
(Angle sum postulate of a triangle)
(corresponding angles)
(vertical angles)
The first method is substitution. This is when the x or y value that is known is substituted into one of the equations. This should be done when you can easily see or find the x or y value.
Example: x = 3, and x + 8y = 30.
The x was given in the first equation (x = 3), and can therefore be substituted into the other equation to find y.
The next method is elimination. This is when you add the two systems together and eliminate either the x values or the y values. This should be done when there are opposite signs of the same number in both equations.
Example: y - 3x = 24, and 2y + 3x = 7
In the first equation you have -3x, and in the second you have 3x. If you were to add the two equations, the x values would cancel out and you would be left with:
y + 2y = 24 + 7
And then you could solve for y.
The last method is to graph both equations and to see at which point the lines intersect.
17=z-(-9)
17=z+9
17-9=z
8=z To check
17= 8-(-9)
17= 8 +9
17=17 it checks
If we say that this linear function is 
, then the input of the function would be defined by 
, which is 2 in this case.
This basically means we are finding when is 2, or 
, or in layman's terms, what the 
value is when is 2.
If we find 2 on the -axis, and see where the line is on the -axis, we see that when the input of the function is 2, the output is -6.
Hope this helps!
Answer:
Temperature range in Mongolia
Average temperature in most of the country is below zero from November to March and close to it in April and October. Winter nights of -40°C are common most years (minimum recorded -55°C at lake Uvs). Summer extremes reach as high as +40°C in the Gobi Desert and +33°C in the capital Ulaanbaatar.
Step-by-step explanation:
