The answer is c! GCF is 2
Lets x and y are the two numbers
so
x+y = 72
x-y = 24
------------subtract
2x = 48
x = 24
x+y = 72
y = 72 - x
y = 72 - 24 = 48
answer
two numbers are 48 and 24
Well, Mark has
1 1/3 of yellow paint
1 1/4 of green paint and
7/8 of blue paint
now, bear in mind, the yellow is a bucket and 1/3 more, the green one is one bucket and 1/4 more and the blue is 7/8 which is almost 8/8, so is almost a bucketfull.
Then he's going to use 3/4 of each, so, we'd have to subtract 3/4 from each, and there'll be some left still in the paint bucket.
How many will he have left altogether? well, we simply add the leftovers.
The answer would be milliliter. Hope that is helpful.