Q: What is the LCD of 7 9?

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LCD(7,9,13) = 7*9*13 which is 819

126

63

The LCD for 7 and 9 is 63.

To find the lcd of any set of numbers, you must find the lowest number which all of the numbers in the set can divide evenly into. For example, to find the lcd of 7,8, and 9, you must first see if there are any numbers that can divide by 2 of the three numbers in the set. An example of such a number is 56. 56/7 = 8 56/8 = 7 Once you have a number like this, the final step is to multiply that number by the other number in the set that does not divide into it (in this case, 9) 56x9 = 504 So, the lcd of 7, 8, and 9 is 504.

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LCD(7, 9, 2) = 126.

LCD(7,9,13) = 7*9*13 which is 819

63

63

126

It is: 63

126

315

If you meant LCD, the answer is LCD(9, 7, 18) = 126 But if you did mean LDC, then apologies. I have no idea what that LDC is in a mathematical context.

63

504

The LCD (Lowest Common Denominator) of 7 and 9 is 63.