If x^2+1/x^2=3 find the value of x^2/(x^2+1)^2 express answer as a common fraction.

International calls require the use of a country code. many country codes a 3-digit numbers. country codes do not begin with a 0 or 1. there are no restrictions on the second and third digits. how many different 3-digit country codes are possible?

15 and 14.7 are 1 apart, so 15 – 14.7 must be 1.

1. evaluate 8x(2)y9(-2) for x=-1 and y=2 2. simplify the equation. -() 3. simplify the expression. [tex]\frac{5}{x(-2) y9(5)}[/tex]