Answer:
Doesn't exist
Step-by-step explanation:

Hence, the slope of line doesn't exist.
If he has completed 3/5 he needs to go (1-3/5 ) 2/5 yet
4000* 2/5 =1600
He needs 1600 points
A counter example is
f(x)=5x^5+2x^3+3x
g(x)=-5x^5-x^4+x^2-4
Then f(x)+g(x) = -x^4+2x^3+x^2+3x-4 which is a polynomial of degree 4.
So the answer is no. Counter-example is given above.
A(n)=4+4(n-1)
a(n)=4+4n-4
a(n)=4n
76=4n
n=19
The sum of any arithmetic sequence (series are infinite) is:
(a+a(n))(n/2)
The average of the first and last terms times the number of terms, in this case we found that n=19 so:
19(4+76)/2=760
try dividing 2/3 by 1/2 idk if u can get any of those ansewrs