+0  
 
0
101
1
avatar

A successful author invests some of his earnings in two accounts for 1 year. the function f(x)=.05 models the interest he earns on x dollars invested in the first account. the function g(x)=.075(x+2500) models the interest he earns from the second account, in which he invests $2500 more than in the first account.

Evaluate (f+g)(18,500) and interpret what it means in this situation

 Mar 3, 2020
 #1
avatar+24825 
+1

f(x) = .05 x

g(x) = .075(x+2500)  

 

f+g =   .05x   + .075 (x+2500)

           .05x   + .075x  + 187.50

            = .125 x   + 187.50

    f+g (18500)    would represent the interest from an acccount with 18500 and from an account with  21000 in it  ( BOTH accounts)

            = .125 (18500) + 187.5

           2312.50   + 187.50      =  $ 2500   

 Mar 3, 2020

13 Online Users