Hi I need someone to help me with this problem, I keep getting decimals but when I check the answer on desmos its whole numbers. Any help would be appreciated! Solve the system by ELIMINATION.

2x+10y=10

-7x-7y=21

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

What is the value of n in the equation -1/2(2n+4)+6=-9+4(2n+1)

Drag each equation to the correct location on the table. for each equation, determine the number of solutions and place on the appropriate field in the table.