Please help. I really need an explanation on how to do the process too. solve each system by elimination.
5x - y = 4
2x - y = 1

When a rectangle is dilated, how do the perimeter and area of the rectangle change?

Find the cosine function that is represented in the graph.

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 (%).