As shown in the diagram below, AABC - A DEF, AB=14, BC=4, DE=7, and EF = X D
14
B
4
С
E
X
F
What is the length of EF?
А
28
B
14
2
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?

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Billy plotted −3 4 and −1 4 on a number line to determine that −3 4 is smaller than −1 4 is he correct? explain why or why not?