North america burned 4.5 x 1016 btu of petroleum in 1998. at this rate, how many btu's will be burned in 9 year?

Solve -2(4y + 6) = 52. 5 -5 8 -8 and !

Give me the equations of two lines that have the same slope but are not parallel.

Aball is dropped from a height of 10m above the ground. it bounce to 90% of its previous height on each bounce. what is the approximate height that the ball bounce to the fourth bounce?