Please help me with this math problem I cannot figure it out

Simplify 15(x - 4)(x -1)-3(x + 4)(x - 1) with steps

F(x) = 1/x g(x)=x-4 can you evaluate (g*f)(0) ? why or why not?

Aaron invested a total of $4,100, some in an account earning 8% simple interest, and the rest in an account earning 5% simple interest. how much did he invest in each account if after one year he earned $211 in interest? select one: a. $200 at 8%, $3,900 at 5% b. $3,200 at 8%, $900 at 5% c. $900 at 8%, $3,200 at 5% d. $3,900 at 8%, $200 at 5%