Which equation represents a proportional relationship? y = 7x – 3
y = 150x
y = 21x
y = 2x + 1

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.

The sum of the squares of two numbers is 8 . the product of the two numbers is 4. find the numbers.

If you have 12 feet of string and you cut it into equal length of 5 inches each how much string will be left