9is the greatest common factor of what 2? 9 and 12. 9 and 30. 18 and 36. 18and 27.

As the name suggests, the greatest common factor of two numbers is the largest number that divides both numbers. So, the first two options are surely wrong: 9 can't be the GCF of 9 and 12 because it doesn't divide 12, and it can't be the GCF of 9 and 30 because it doesn't divide 30.

As for the third option, 18 and 36 are actually both multiples of 9, but 9 isn't the GCF, because both numers are divisible by 18. So, the greatest common factor between 18 and 36 is 18 itself.

So, the answer is the last option, because you have

So, 9 is actually the greatest common factor between 18 and 27.

the first one, all those points on the line just make a strait line.

so a parallelogram is just like a square base times height. multiply 40 and 39 to get 1560 inches.

a triangle is base times height divided by two. so multiply 7.9 and 5 and then divide it by 2 to get 19.75inches.

the kite can be split into two separate triangles and added together to get the total area. 30 x 4 /2 which equals 60. make sure to double it for the two triangles making 120.