The functions r and s are defined as follows. r(x)= 2x+2 s(x)= -2x^2-2 find the value of s(r( i have no clue how to do this someone !

This is a problem of composition of functions. So, we have the following equations:




First of all, we find the value of r(4), that is, substituting x = 4 in the equation we have:



Then we find s(r(4)) that is equal to s(10), therefore substituting x = 10 in the equation we have:

21, i'm pretty sure it's right lol