I think it’s A. Don’t hate if it’s wrong please!
Answer:
B.) 5, -1
Step-by-step explanation:
Formula:
ax^2+bx=c
Shift the equation and set it equal to 0 by subtracting c.
ax^2+bx+c=0
So, in this case:
x^2-4x=5
Shift the equation:
x^2-4x-5=0
a= 1
b= -4
c= -5
Now, to figure out the zeros of an equation like this:
You need to find two numbers that multiply to c (-5), but also add to b (-4).
These numbers are 5 and -1
So, the zeros of the equation are 5 and -1.
When you graph those points you can see that the slope of the line is 2.5. Since it is consistent it is very much a linear equation. This line also goes through the point (0, 0), which makes sense if you think about it...if you don't buy any cd's (0 cd's) you shouldnt be spending any money, right? The equation then for this relationship, using the fact that the y-intercept is 0, isy = 5/2 x or y = 2.5x. Either one is fine. They're exactly the same.
Answer:
x= 7/4
(in decimal form) x= 1.75