Evaluate x(–y + z) for x = 5, y = 9, and z = 1.

a.) –40
b.) 50
c.) 46
d.) –44

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?

In right ∆abc shown below, the midpoint of hypotenuse ac is located at d and segment bd is drawn. if ab = 12 and bc = 16, then explain why bd = 10. hint: consider what you know about the diagonals of a rectangle.

Can some one explain this i got sent this. is this a threat i’m scared