If the ratio of children to adults is 7:8 and there are 140 children at an amateur surfing competition, how many adults are in attendance?

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 are the solutions for the following system? -2x^2+y=-5 y=-3x^2+5

1/4x+5=3/4. i can't get access to the answer to this question! and, my request on "contact us" will not go