polly knit a total of 45 centimeters of scarf over 5 nights. how many nights. how many nights will polly have to spend knitting in order to knit a total of 63 centimeters of scarf​

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.

Which inequality comparing two of the expressions is true when 0.7 < x < 0.9

Suppose i flip two identical coins. what is the probability that i get one head and one tail?