Roman has a certain amount of money. If he spends $15, then he has 1/4 of the original amount left. How much money did Roman have originally

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 (%).

If y varies directly as x2 and y=6 when x=6, find the constant of variation.

What is the perimeter of an equilateral triangle if each side is (x+3)?