So just switch x and y to get: 

 and solve for x.
so f(-1) = x = 2y -10
 
        
        
        
Answer:
Infinite Amount of Solutions
Step-by-step explanation:
Since we have concurrent systems (same slope + same y-int), we know that the systems of equations would be the <em>exact</em> same line. If that is the case, the we would know that ANY value input would work. You could even test it mathematically, and it would give you infinite amount of solutions.
 
        
             
        
        
        
A function assigns the values. The range of the function will be between (-∞,10].
<h3>What is a Function?</h3>
A function assigns the value of each element of one set to the other specific element of another set.
The given function f(x)=10-x² is a parabolic function that is negative, therefore, will open downwards. Now, the range of the function can be found as,
f(x)=10-x²
y=10-x²
y-10 = -x²
-y+10 = x²
-y + 10 = 0
y = 10
Thus, the range of the function will be between (-∞,10].
Learn more about Function:
brainly.com/question/5245372
#SPJ1
 
        
             
        
        
        
Answer:
The percent of error in her measurement is 1.3%
Step-by-step explanation:
we know that
The circumference of a circle is equal to

where
D is the diameter
we have

assume 

substitute
 ----> This value represent the 100% (theoretical value)
 ----> This value represent the 100% (theoretical value)
Find the difference between the theoretical value and the measured value
 
 
Find the percentage by proportion

 
        
             
        
        
        
The right triangle is also Isosceles. It has two equal angles of 45°.
(hypotenuse)² = 2S²
4 = 2S² => S = √2
Therefore B is the correct answer.