Answer:
║x - 175,000║≤ 20,000 
Step-by-step explanation:
Let x be the amount the Fraziers are willing to pay. Since the house costs $175,000 and they are willing to deviate from this price no more than $20,000, so x =  $175,000 ± $20,000. 
So, x - 175,000 = ± 20000
║x - 175,000║= 20,000
But we require  
║x - 175,000║≤ 20,000 
which is our required open sentence.
 
        
             
        
        
        
Answer:
70 degrees
Step-by-step explanation:
Find the diagram attached 
The sum of the angles is supplementary that is
45 + 2x- 5 = 180
2x + 40 = 180
2x = 180 - 40
2x = 140
x = 140/2
x = 70
Hence the value of x is 70 degrees
 
        
             
        
        
        
If we let m₁, m₂, and m₃ be the measures of the angles of the triangle, the equation that would relate them to each other is,
     m₁ + m₂ + m₃ = 180
Given the measures of the first two angles, the measure of the third angle is calculated through the equation,
    m₃ = 180 - (m₁ + m₂)
Substituting the known expressions,
    m₃ = 180 - (-3x⁵ + 2x²)
Simplifying,
<em>    m₃ = 180 + 3x⁵ - 2x²</em>