That would depend on what integer Y stands for.
Y
The least common multiple of two primes x and y, is x * y.
18x2y
That would depend on the value of Y.
72xy
3
If x is the multiple of y then LCM of x and y is x. Here, 80 is the multiple of 10 therefore LCM of 10 & 80 is 80.
If the GCF of w and Y is 1, multiply them together.
That depends on their numerical values.
Their product.
84x3y
There refers to location.Their refers to joint property.If X = 7*a and and Y = 7*b where a and b are co-prime integers, then X and Y will have 7 as their GCF.For example, a = 8 and b = 21X = 56, Y = 147.