Answer:
x = 21.3 repeating. so put the - on top of the 3 if you're writing it down
It would be 2 6/7
the reason why it is right because i am so smart and i am in school...
Answer: y=<em>300</em>-40x
The <em>y-intercept</em> would be 300
The slope would be -40
Step-by-step explanation:
x=number of months
300 is the amount she starts with
Equation can also be written like so; y=-40x+300 just like in y=mx+b (slope intercept) form
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.