Y is directly proportional to x when y = 30 , x =6

a) work out an equation connecting y and x
b) work ou the value of y when x = 12

Ivan and jeff buy a package of 8 pens for $4.00. ivan wants 5 of the pens, and jeff wants 3.how much should each student pay?

How many different three-digit numbers can be formed using the digits 1 comma 2 comma 9 comma 6 comma 4 comma 3 comma and 8 without repetition? for example, 664 is not allowed.

Which is greater, 7 p 5 or 7 c 5? 7p5 7c5