I need help please help

Find and simplify an expression for the area of five rows of x squares with side lengths of x centimeters.

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?

Ineed to know the ordered pairs for this equation i need the answer quick because it’s a timed test