A/4−5/6=−1/2 please help

How do i get the answer for 2/3 * 10/3

Plot the points (0,6), (3,15.8), and (9.5,0) using the graphing tool, and find the function

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?