Answer:
A
Step-by-step explanation:
If you graph the equation f(x) = -16x^2+25x+15. You would need to pay attention to the x value which is somewhere in between 0.75-0.9. 
Another way is to convert the equation into vertex form.
 
        
                    
             
        
        
        
Answer:
X12/45 =32
Step-by-step explanation:
 
        
                    
             
        
        
        
The solution of the system of equations is (-3 , -2) 
Step-by-step explanation:
Steps for Using Linear Combinations Method)
- Arrange the equations with like terms in columns
- Analyze the coefficients of x or y
- Add the equations and solve for the remaining variable
- Substitute the value into either equation and solve
∵ 3 x - 8 y = 7 ⇒ (1)
∵ x + 2 y = -7 ⇒ (2)
- Multiply equation (2) by 4 to make the coefficients of y are equal in
  magnitude and different in sign
∴ 4 x + 8 y = -28 ⇒ (3)
Add equations (1) and (3) 
∵ 3 x - 8 y = 7 ⇒ (1)
∵ 4 x + 8 y = -28 ⇒ (3)
∴ 7 x = -21
- Divide both sides by 7
∴ x = -3
Substitute the value of x in equation (2) to find y
∵ x + 2 y = -7 ⇒ (2)
∵ x = -3
∴ -3 + 2 y = -7
- Add 3 to both sides
∴ 2 y = -4
- Divide both sides by 2
∴ y = -2
The solution of the system of equations is (-3 , -2) 
Learn more:
You can learn more about the system of the linear equations in brainly.com/question/13168205
#LearnwithBrainly
 
        
             
        
        
        
Answer:
sometimes it be like that
Step-by-step explanation:
y 
e 
s 
 
        
             
        
        
        
Answer:
D.2.58
Step-by-step explanation:
We have that to find our  level, that is the subtraction of 1 by the confidence interval divided by 2. So:
 level, that is the subtraction of 1 by the confidence interval divided by 2. So:

Now, we have to find z in the Ztable as such z has a pvalue of  .
.
That is z with a pvalue of  , so Z = 2.58.
, so Z = 2.58.
The answer is given by option D.