The melting point of the chemical bromine is -7.2 c. the boiling point of bromine is 58.8 c. write and solve an equation to find how much greater the boiling point of bromine is than the melting point. hurry answers !

Abox contains 1 plain pencil and 4 pens. a second box contains 5 color pencils and 5 crayons. one item from each box is chosen at random. what is the probability that a plain pencil from the first box and a color pencil from the second box are selected? write your answer as a fraction in simplest form.

Solve: 3x+y=6 4x-2y=18 show all work !

An airplane travels at an unknown elevation before it descends 3 miles to an elevation of 15 miles. find the elevation of the plane before its descen.