One way to locate the vertex is to obtain the coefficients a, b and c from the quadratic and then calculate
-(-16)
x = -b / (2a). Here, x = ---------- = -2
2(-4)
Next, evaluate y at x = -2: y = -4(-2)^2 - 16(-2) - 12 = -16 + 32 - 12
y = 4
the vertex is at (-2,4).
In the expression f(x)=23, x is not a variable. f(x) means “a function of x” or “f of x” and is in practice another way of substituting for the variable y, that is, we are saying:
y=23.
That means x is unspecified and could be anything. So on the xy plane, this is a straight horizontal line, 23 units above the x axis. That would be the best way to interpret this, although it is a little ambiguous.
Usually functions of x are expressed in terms of x, such as:
f(x) = x^2
Answer:
and 
Step-by-step explanation:
The first answer you are just adding 4 and 1/4. The second answer you are adding a negative number with a postive fraction so you get a negative fraction.
Answer:
Step-by-step explanation:
Answer:
You would make about $500 per week
Step-by-step explanation:
There are about 4 weeks per month
2,000 ÷ 4 = 500
So ~ 500 per week
Hope this helped!
Have a supercalifragilisticexpialidocious day!
