60 POINTS PLS HELP IF U HELP ILL SEND U 60 MORE POINTS plz show/explain ur work- how u know pls
1. 9x-7- -7
2. 2(n+5)=-2
3. -9x+1= -80

Let f (x) = x e8x. find a formula for the nth derivative of f, where n is any positive integer. use x and n in your answer if needed. f (n)(x) =

Find the value of x for which the lines are parallel.

Prove that the value of the expression 7^8–7^7+7^6 is divisible by 43.