All of the following solid figures except have two congruent, parallel bases.
cube
cylinder
rectangular pyramid
heptagonal prism

Which equation results from adding the equations in this system? x+6y=9 and -x+2y=-15

Awater holding tank measures 105 m long, 50 m wide, and 8 m deep. traces of mercury have been found in the tank, with a concen- tration of 60 mg/l. what is the total mass of mercury in the tank? answer in units of kg.

The price of a dozen eggs was $1.63. suppose the price increases m dollars per dozen and then the price decreases $0.12 per dozen. which expression represents the current price of eggs after the two price changes?