The roots from smallest to greatest are -3, 1, and 5/2 or (2 1/2).
Given:
The power generated by an electrical circuit (in watts) as function of its current x (in amperes) is modeled by:

To find:
The current that will produce the maximum power.
Solution:
We have,

Here, leading coefficient is negative. So, it is a downward parabola.
Vertex of a downward parabola is the point of maxima.
If a parabola is
, then

In the given function, a=-12 and b=120. So,



Putting x=5 in the given function, we get




Therefore, 5 watt current will produce the maximum power of 300 amperes.
Of means multiply, so it would be 40% x 64
40% is equivalent to 0.40, so you would use the equation
C. 0.40(64) = n
Answer:
6x/4-24=x-2
6x/4-24/1=x-2
(6x/4)1-(24/1)4=x-2
6x/4-96/4=x-2
(6x-96)/4=(x-2)/1
Then cross multiply to get this;
(6x-96)1=(x-2)4
6x-96=4x-8
6x-96+96=4x-8+96
6x=4x+88
6x-4x=4x-4x+88
2x=88
Divide both sides by 2
2x÷2=88÷2
x=44
Thank you.
BY GERALD GREAT.