Given the function of y=2x_4'for x =3,4,5,6and 7.show that this is a null relation​

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?

Solve the equation -9p - 17 =10 a -3 b. 16 c. 18 d -16

Which expression is rational? 6. , square root two, square root 14, square root 49