Rectangle DEF is similar to rectangle JKLM. Rectangle DEFG has a length of 5 units and a perimeter of 16 units. Rectangle JKLM has a length of 10 units. What is the perimeter of rectangle JKLM?

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.

Cal's go cart has a gas tank with the dimensions shown below. he uses a gas can that holds 11 gallon of gas, to fill the go cart tank. 11 gallon = 231 inches^3 how many full gas cans will it take to fill the go cart's gas tank?

What is the answer to the question 5x+2x