It is -6/10 and 6/10, just take the square roots of the top and bottom and make it a fraction, square root of 36 is 6 and 100 is 10 so you get 6/10 and since 2 negative make a positive, you can have the negative sign next to the whole fraction, not the number though.
Rewrite the function as:
y = -2/3x
Switch the variables x & y:
x = -2/3y
Solve for y:
x *-3/2 = -2/3y *-3/2
-3x/2 = y
So, the inverse is:
f^-1(x) = -3x/2
The coordinates of the vertex are (3, -13) and the axis of symmetry is at x = 3.
We can find the vertex by using the formula for finding x-coordinates. The formula for the x-coordinate of a vertex is below.
-b/2a
In this equation, a is the coefficient of the x^2 term (1) and b is the coefficient of the x term (-6). Then we can plug in to find the x term.
-(-6)/2(1)
6/2
3
Now that we have this term, we can plug it in for all values of x to find the y term.
x^2 - 6x - 4
3^2 - 6(3) - 4
9 - 18 - 4
-13
Now we know that the vertex is at (3, -13). Now finding the axis of symmetry is easy because the axis of symmetry in any quadratic is simply x = [x-coordinate of vertex]. So in this case it would be x = 3.
The correct answer would be a and c
Answer:
48
Step-by-step explanation:
Hope this helps!
=)