Loris has one of each of the following colours of felt-tip pen in her pencil case: red (R) blue (B) yellow (Y) green (G) purple (P)
She pulls out two random pens.

How many different combinations of pairs of colours are there?

Students are given 3 minutes for each multiple-choice question and 5 minutes for each free-response question on a test. there are 15 questions on the test, and students are given 51 minutes to take it. how many multiple-choice questions are on the test?

Which expression shows the sum of the polynomials with like terms grouped together

    choose the correct definition for  extremo.  a.  end      b.  extra      c.  extract      d.  eventual