Answer:
it is b because I did the problem yes it is b
 
        
             
        
        
        
X - (-20) = 5
When you subtract a negative, change it to addition:
X + 20 = 5
Subtract 20 from both sides:
X = -15
 
        
                    
             
        
        
        
The total cost was 116% of the original bill;
Original bill was;

= <span>$22.5</span>
 
        
        
        
Answer:
This tells us that the vertex is at (−2, 9) and the equation of the axis of symmetry is x = −2. To find the x-intercepts, we put y = 0 to obtain
 (x + 2)2 − 9 = 0
 (x + 2)2 = 9
 x + 2	= 3  or  x + 2	= −3
  x	= 1  	or  	x	= −5.
Step-by-step explanation:
Image result for Which quadratic function has a y-intercept of 4? y=x2−2x+4 y=x2+2x+9 y=−x2+3x y=x2+13x+12
The standard form of a quadratic equation is written as y=ax2+bx+c, where x and y are variables and a, b, and c are known constants. To find the y-intercept from a quadratic equation, substitute 0 as the value for x and solve. The y-intercept is always equal to the value of c in the equation.
 
        
                    
             
        
        
        
Price before tax = $18
Tax = 7% x $18 = 0.07 x 18 = $1.26
Price after tax = $18 + $1.26 = $19.26
Answer: $19.26