You get in an elevator and ride down 5 floors. You realize you forgot something, so you stay on the elevator and ride back up 5 floors. Which expression represents the number of floors you are from your original position?

At the beginning of the fall, the water level of a lake is 7 feet below normal level. After a drought, the lake's water level dropped 2 1/3 feet. Where is the lake's current water level in relation to its normal water level?

A red string of lights blinks once every 3 seconds while a string of blue lights blink once every 4 seconds. How many times will both sets of lights blink at the same time in 60 seconds?

Are they scaled copies or not? If so how do I find out?

one winter day,the temperature ranged from a high 20°F to a low -25°F. By how many degrees did the temperature drop?

Can anyone help with this, very emergency! !

Please Help! i am on the last stretch for a test, and i seriously need help with this question. i know its lame, but i really am stuck ;-;