Find the lcm of 9 and 15. 1 3 45 135

[ Answer ]

[ Explanation ]

LCM of 9 & 15

LCM - Least Common Multiple

The LCM is the smallest number that two or more numbers both fit into evenly

45 is the LCM because it is the smallest number that *both* 9 and 15 fit into evenly, without any numbers left over.

9 * 5 = 45

15 * 3 = 45

i believe it is c.y = 9x

rise over run. 9 units up over 1 unit right or 9/1

proportions are fractions that equal to each other. so if two fractions are the same, they are proportional.

let's check the answers to see if they are proportional.

question a is not proportional because you can't turn 1.5/3 to 3/9. if you try to multiply 1.5/3 by 2 or 3, you wont get 3/9. it's impossible to make the fractions the same.

question b is not proportional because you can't turn 22/33 to 4/6. 33 can't go into 6.

question c is proportional because when you multiply 2 and 3 by 71, you would get 142/213, and those fractions equal to each other

question d is proportional because when you divide 14 and 7 by 2, you would end up with 7/3.5, and those fractions equal to each other.