<span>Numeral expression
is composed of numeric constants and operation while variable expression
consist of both numeric and variables constants.
d dozen of eggs converted to numerical or variable expression:
=> There are 12pieces of eggs in 1 dozen, so
that is 12x1=12
=> Therefore, the numerical value is 12 x d or simply
12d </span>
43,000 because if you multiply 215,000 by .20 which is 20%, you will get 43,000
Since both A and B are squared they can be added normally. So A+B would be
(5x^2)+(-3x^2+6) = 2x^2+6.
I = prt is the formula for simple interest
400 = 8000* .02 * t
400 = 160 * t
2.5 = t
2.5 years to earn $400 interest