Which is heavier: 500 pounds of feathers or 500 pounds of lead?

Select a graph that have an equation with a < 0

Given the system of equations presented here: 2x + 4y = 14 4x + y = 20 which of the following actions creates an equivalent system such that, when combined with the other equation, one of the variables is eliminated? multiply the second equation by â’4 to get â’16x â’ 4y = â’80 multiply the second equation by â’1 to get â’4x â’ y = â’20 multiply the first equation by 2 to get 4x + 8y = 28 multiply the first equation by â’1 to get â’2x â’ 4y = â’14

Two years ago a man was six times as old as his daughter. in 18 years he will be twice as old as his daughter. determine their present ages.