SOLUTION: r(x)=x-5,s(x)=4x+2. Write the expression for :(r-s)(x)=,(r*s)(x)=,(r+s)(1)=

Algebra ->  Functions -> SOLUTION: r(x)=x-5,s(x)=4x+2. Write the expression for :(r-s)(x)=,(r*s)(x)=,(r+s)(1)=      Log On


   

Question 1083167: r(x)=x-5,s(x)=4x+2. Write the expression for :(r-s)(x)=,(r*s)(x)=,(r+s)(1)=
Answer by Fombitz(32388) About Me  (Show Source):
You can put this solution on YOUR website!
r-s=x-5-4x-2=-3x-7
.
.
r%2As=%28x-5%29%284x%2B2%29=4x%5E2%2B2x-20x-10=4x%5E2-18x-10
.
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r%2Bs=x-5%2B4x%2B2=5x-3
So when x=1,
r%2Bs=5%281%29-3=5-3=2