pita has 12 coins in her bag there are three £1 coins and nine 50p coins she takes 3 coins from the bag at random work out theprobability that she takes exactly £2.50

Find parametric equations for the line tangent to the curve of intersection of the surfaces at the given point. surfaces: xsquared2plus+2yplus+2zequals=1212 yequals=33 point: left parenthesis 1 comma 3 comma five halves right parenthesis

How do i simply this expression (quadratic formula basis) on a ti-84 or normal calculator?

The map shows the location of the airport and a warehouse in a city. though not displayed on the map, there is also a factory 112 miles due north of the warehouse. a truck traveled from the warehouse to the airport and then to the factory. what is the total number of miles the truck traveled?