2 3/4c+ 3 1/8c+7 help please!:)

Shania's test scores in 8 subjects were 88, 91, 85, 74, 69, 72, 80, and 87. shania found the middle number of her scores. which type of measure did she find?

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

Which radical expression is a rational number? a. √ 360 b. √ 644 c. √ 225 d. √ 122