Which postulate would you use to justify that triangle xyz is similar to triangle xab?

AA similarity test
Angle YXZ = Angle AXB common angle
Angle YZX = Angle ABX alt angles since the two lines are parallel

These triangles are similar by the AA Similarity Theorem. The triangles share an angle, which makes the two similar. In addition, the created angles (which come from the parallel lines), forces all of the angles to be congruent, while allowing sides to vary in length.

:)

When rates are expressed as a quantity of 1, such as 2 feet per second or 5 miles per hour, they are called unit rates. if you have a multiple-unit rate such as 120 students for every 3 buses, and want to find the single-unit rate, write a ratio equal to the multiple-unit rate with 1 as the second term.

Y=-2x-6 is the answer