(-6,0) and (1,b) slope=8/7

Cody was 165cm tall on the first day of school this year, which was 10% taller than he was on the first day of school last year.

Using elimination, what is -4x+2y=-12 4x+8y=-24

Maria found the least common multiple of 6 and 15. her work is shown below. multiples of 6: 6, 12, 18, 24, 30, 36, 42, 48, 54, 60, . . multiples of 15: 15, 30, 45, 60, . . the least common multiple is 60. what is maria's error?