Andy has 3r - 3 baseball cards. micah has 2r + 5 baseball cards. if r = 14 who has more baseball cards?

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?

What is the expression in factored form? -x^2 + 3x + 28 a. (x-7)(x-4) b. -(x-7)(x+4) c. (x+4)(x+7) d. -(x-4)(x+7)

Asystem of equations has 1 solution. if 4x-y=5 is one of the equations , which could be the other equation ?