There are 645 students at Tech Middle School, and 20% of the students are th graders, How rising
Students are 7th graders? ?

Adrawer contains 12 identical white socks, 18 identical black socks and 14 identical brown socks. what is the least number of socks you must choose, without looking, to be certain that you have chosen two socks of the same colour?

Use multiples to write two fractions equivalent to 7/9. 14/18, 8/10 6/8, 21/27 10/12, 28/36 14/18, 21/27

What is the area of a triangle with vertices at (-3 3) (-3,2) and (1,2)?