solve.
1. e(7)
e(x)=-x^2-9x
2. a(-4)
a(x)=40-x^3
1. e(7)=-72-9(7)
=-49-63
=-112
2. a(-4)=40-(-4)3
=40-(-64) or 40+64
=104
thank you!
+12 
