Answer:
Step-by-step explanation:
F(x) = 7 - 5x + 7x²
f(-9) = 7 - 5*(-9) + 7*(-9)²
        = 7 + 45 + 7*81
       = 7 + 45 + 567
       = 619
 
        
                    
             
        
        
        
Answer:
No
Step-by-step explanation:
12:15 can be simplified to 4:5
6:14 can be simplified to 3:7
These two are not equivalent to eachother
 
        
             
        
        
        
80/100*n=16
80n=1600
n=1600/80=160/8=20
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Original price: $20.00
        
                    
             
        
        
        
Answer:
y=8x-29
Step-by-step explanation:
Since we know the slope (m) is 8, we can plug it in the slope-intercept formula y=mx+b, making y=8x+b. 
Now we need to find the y-intercept (b). To do that, you would need to plug in the points given to you, which were (4,3). 
x=4, y=3... so 3=8(4)+b
Now you can solve for the variable b to find the y-intercept.
3=8(4)+b, multiply...
3=32+b, subtract 32 on both sides...
-29=b
Therefore, the y-intercept, or b, is -29.
The equation would be y=8x-29
 
        
             
        
        
        
Answer: B
Step-by-step explanation:
The domain of a function is the set of x-values.