2 Joanna went school supply shopping. She spent $29.56 on notebooks and pencils. Notebooks cost $2.50 each and pencils cost
$1.12 each. She bought a total of 19 notebooks and pencils. How many of each did she buy?

There was 504 pages in that chunk

Hello! i hope this
since the cosine is the ratio of the adjacent side to the hypotenuse, you can see that cos 60° = ½. answer. according to the property of cofunctions (topic 3), sin 30° is equal to cos 60°. sin 30° = ½.

Don’t know sorry about that