Question

Can someone please explain!! Evaluate each expression for r= -3 and s= 5. r=-3 Answer=

Answer 1

It is asking you to substitute or plug in the values. 

Example:

 Evaluate 3r(s+3) if r = -3 and s = 5

See that r? It means that you put in -3 in place of the r, and you put 5 in place of the s so it looks like this:

3*-3(5+3)

Now solve that using order of operations and you should get 
-9*(5+3)  (don't forget that your'e distributing here FIRST then add)

-45+-27

-72

That's how you solve an expression like that. This is only an EXAMPLE. Hope it helped.