Which triangles are similar to ΔDEF? (show work)

One integer is 8 times another. if the product is 72, then find the integers

Angle xyz is formed by segments xy and yz on the coordinate grid below: a coordinate plane is shown. angle xyz has endpoints at 3 comma negative 1 and 6 negative 2 and 3 comma negative 3 and measures 36.87 degrees. angle xyz is rotated 270 degrees counterclockwise about the origin to form angle x′y′z′. which statement shows the measure of angle x′y′z′?

Two variables, x and y, vary inversely, and x=12 when y=4. what is the value of y when x=3?