How many integers are there between 15 and 63? A) 3 B)4 C) 5 D) 6 E) 7

Ineed i do not understand i'm only 8

Acollection of coins has value of 64 cents. there are two more nickels than dimes and three times as many pennies as dimes in this collection. how many of each kind of coin are in the collection?

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