F(a)=a^4+17a^3+50a^2-39a-220 at x=-13

I assume that you meant "at a=-13", since the expression does not depend on x.

However, evaluating a function at a specific input values simply means to substitute every occurrence of the variabile with the specific value: if

then

And it becomes a simple, numerical calculation that you can do with every calculator:

step-by-step explanation:

i think something is missing in your question because y-1=(x-12) would not pass through the point (-4,-3). because if you replace x by -4 your are supposed to find y=-3 which is not the case her. if you replace x by -4 you find =-15.

i assume the right equation is y-1=1/4*(x-12) because this one is passing through both your points (if you are interested to know how i found that out i can tell you).

in this equation if i replace x by -4 i find y=-3 and if i replace x by 12, i find y=1 so the line representing this equation is passing through those 2 points.

then the standard form of the equation is finding an expression of y in function of x

y-1=1/4*(x-12)

y=x/4-3+1

y=x/4-2

hope that .

do you confirm there was a mistake in the question?

the correct answer is a.) bc< mn 5 stars if this you : )

step-by-step explanation: