Question

For f (x)=15x-21+1,find f(-3)

Answer 1

relace \(x\) by \(-3\), that is, compute
\[15\times (-3)-21\]

Answer 2

although i am going to bet there is a typo here, because you rarely see
\[15x-21+1\]

Answer 3

i'll try.. substitute -3 to the X so;
15(-3)-21+1

15(-3) is equal to -45.
-45-21+1 equals -65