Im not sure if this is correct but x=4 double roots
If Eric plays piano, then David will sing.
X intercepts- (2,0) and (-2,0)
y intercept- (0,-8)
PRT+PRT=Total Interest
0.03x+0.11(2x)=104.5
0.25x=104.5
x=418
x+2x, 418+2(418)=1254
Total Investment=1254 dollars