Working together, rocco and giulia can paint a room in 3 hours. it would take rocco 7 hours to do it alone. what is giulia's rate of work in parts per hour?

Aregular hexagon rotates counterclockwise about its center. it turns through angles greater than 0° and less than or equal to 360°. at how many different angles will the hexagon map onto itself?

The table represents a function f(x). what is f(3)? a.-9 b.-1 c.1 d.9

John used linear combination to solve the system of equations shown. he did so by multiplying the first equation by -3 and the second equation by another number to eliminate the x-terms. what number did jonas multiply the second equation by? 4x-6y=23x+5y=11