Find the ratio for cos x.

a. 3/4
b. 3/5
c. 4/5
d. 1 1/3

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.

Write the expression 7x^3-28xy^2 as the product of 3 factors

Identify the number 127 as a rational or irrational. explain