2(x - 9) = 10 can somebody solve this please using a method

Terri makes a quilt using three sizes of fabric squares the side lenght of each fabric square is the square root of the area

Solve this problem! extra ! 3025/5.5 = a/90.75 / = fraction

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?