Hwong has 39 muffins. if each of hos guest will eat 2 muffins, hwong figures that he can serve muffins to 19 guest

Ineed ! the person who answers and shows their work on they got the answer first will be marked the !

Which shows the correct solution of the equation 1/2a+2/3b=50, when b=30?

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?