Answer:
∴(x+5)(x+3) =x²+8x+15
Step-by-step explanation:
Standard form of a polynomial:
Standard of polynomial means that the terms ordered from biggest exponent of variable to lowest exponent of variable.
Example:

Given,
(x+5)(x+3)
=x(x+3)+5(x+3)
=x²+3x+5x+15
=x²+8x+15
∴(x+5)(x+3) =x²+8x+15
The degree of the polynomial is 2 and is a one variable polynomial.
Both millimeters and quarts are units for volume.
I believe the answer is, 2) End of Reconstruction
D.500 meters is an expression of distance in SI units.
7 and 1/2 mile because 2,640=1.5 miles
4-1.5=2.5+5=7.5