Question

Find the LCD of these fractions.4/5x^2y , 8/3xy , 12/13xy^5




A.


195xy


B.


195xy5


C.


195x2y5


D.


195x4y7

Answer 1

can you tell me what LCD stands for?

Answer 2

least common something

Answer 3

denominator

Answer 4

LCD = least common denominator

or

LCD = lowest common denominator

Answer 5

okay

Answer 6

have you learned about LCM (lowest common multiple)?

Answer 7

no

Answer 8

say I have 2 numbers, 6 and 10, and I were to list out their multiples


6: 6, 12, 18, 24, 30, 36, 42, 48, 54, 60, 66, 72, ...
10: 10, 20, 30, 40, 50, 60, 70, 80, 90, 100


what multiples do they share? what is the smallest multiple they both have in common?

Answer 9

none

Answer 10

compared the list of

6, 12, 18, 24, 30, 36, 42, 48, 54, 60, 66, 72, ...

with the list of

10, 20, 30, 40, 50, 60, 70, 80, 90, 100

what numbers are in both lists?

Answer 11

30?

Answer 12

good, 60 is also in there too

but 30 is the smallest number that's in both lists

Answer 13

those lists are multiples (first is of 6, second is of 10)

so the LCM of 6 and 10 is 30

Answer 14

see how that works out?

Answer 15

yes i get it thank you soo much!

Answer 16

you're welcome