Acombination lock will open when the right choice of three numbers, from 1 to 30, is selected. how many

Atriangle with all sides of equal length is a/an triangle. a. right b. scalene c. equilateral d. isosceles

Anumber cube is rolled two times in a row. find the probability it will land on 2 on the first roll and a number greater then 4 on the second roll

Two airplanes start at the same place and travel in opposite directions,one at 395 miles per hour and the other at 422 miles per hour. how many hours will it take for the planes to be 2451 miles apart?