7(5a-9)=100

umm..haha yeah HELP

Ling listed all of the factors of a mystery number: 1,2,4,8,16,32 what is the mystery number?

Find the solution of this system of equation -7x+y=-20 9x-3y=36

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 (%).