Simultaneous inequalities: 2x+y<4 and 4x+6y>0 and x+y<0

If f(x)=3x+1 and f^-1=x-1/3, then f^-1(7)=

Acompany manufactures large valves, packed in boxes. a shipment consists of 1500 valves packed in 75 boxes. each box has the outer dimensions 1.2 x 0.8 x 1.6 m and the inner dimensions 1.19 x 0.79 x 1.59 m. the boxes are loaded on a vehicle (truck + trailer). the available capacity in the vehicle combination is 140 m3. each valve has a volume of 0.06 m3. - calculate the load factor on the box level (%). - calculate the load factor on the vehicle level (%). - calculate the overall load factor (%).

What is the radical expression that is equivalent to the expression 27 1 over 5?