4) a safe contains 120 coins, the value of which is $10. if the coins consist of nickels and dimes, how many of each kind are in it?

2y= 3 2 x−2 y = − 1 3 x + 1 y=− 3 1 x+1

Suppose you are choosing a 6-digit personal access code. this code is made up of 4 digits chosen from 1 to 9, followed by 2 letters chosen from a to z. any of these digits or letters can be repeated. find the total number of personal access codes that can be formed. 492,804 341,172 39,917,124 4,435,236

Can someone, me with this.i really need with this