Answer:
20x + 15 = 11
Step-by-step explanation:
First you need to add the like terms:
-7+2=-5
Now you need to expand the brackets:
-5*-4x=20x
-5*-3=15
Now you have 20x + 15 = 11. So if you want you can rearrange the formule to find x.
20x=-4
x= -5
A triangle is 180°; therefore:
x = 180-52-43
x = 85
x° = 85°
Answer:
Domain
and Range
Step-by-step explanation:
Let 
be the given function
Function:
Function can be defined as "A special relationship where each input has a single output".
It is often written as "" where x is the input value.
Domain:
The domain of a function is the complete set of possible values of the independent variable.
Range:
The range of a function is the complete set of all possible resulting values of the dependent variable (y, usually), after we have substituted the domain.
Function is the set of all ordered pairs of domain and range. It can be written as
where 
are domain and 
are range
Given the ordered pairs of domain and range 
where 
are domain and 
are range.
ie, Domain 
and Range 
The population density in the United States is D = 92.1 people/mi^2
<h3>
</h3><h3>
How to get the population density?</h3>
To get the population density, we need to take the quotient between the total number of people and the area.
In this case, we know that the total population is 325.7 million, and the area of the United States is 3,535,932 mi^2
Then the population density:
D = (325.7 million)/( 3,535,932 mi^2) = 9.21*10⁻⁵ million/mi^2
And we know that 1 million = 1,000,000 = 1*10⁶
Then:
9.21*10⁻⁵ million/mi^2 = 9.21*10¹ people/mi^2 = 92.1 people/mi^2
This means that in each square mile in the United States, there are around 92.1 people.
If you want to learn more about density:
brainly.com/question/1354972
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