The metal bar shown is an alloy of silver and other metals. If the silver accounts for 84% of the bars weight, what is the weight of the silver?

Ihonestly don’t understand this at all

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′?

In the diagram, gef and hef are congruent. what is the value of x