Which expression is not a polynomial? a.8x^10+2x^5 b.14x^7 c. x^2/ x^-3 d.4-3x+5x^6

Donald has x twenty-dollar bills and 11 ten-dollar bill. how much money does donald have? write your answer as an expression.

Someone answer asap for ! the boiling point of water at an elevation of 0 feet is 212 degrees fahrenheit (°f). for every 1,000 feet of increase in elevation, the boiling point of water decreases by about 2°f. which of the following represents this relationship if b is the boiling point of water at an elevation of e thousand feet? a. e = 2b - 212 b. b = 2e - 212 c. e = -2b + 212 d. b = -2e + 212

Micheal is 4 times as old as brandon and is also 27 years older than brandon. how old is micheal