Arectangular backyard has dimensions represented by the expressions shown. which expression represents the perimeter of the backyard?

a. 4x-2
b. 3x+2
c. 6x^2+4
d. 6x+4

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?

You are making a battery for a science project. you have copper wire for your first electrode. you need to choose a conductor, a second electrode, and a device to plug into your battery. you have already chosen a lemon conductor. complete each statement below about the options that include a lemon conductor.

How can i differentiate this equation?