Answer:
D 45
Step-by-step explanation:
90/2 = 45
135/3 = 45
180/4 = 45
So first we cross multiply
7/a times 7/40 which equals = 28a and 280
Divided both sides by 28.
28a divided by 28 = A. Then 280 divided = 10
So a = 10
Answer:
40 is the answer I also got 40
Start by setting up a factor tree for each number.
Factor in anyway that you'd like.
At the end, circle all prime numbers.
Remember, prime numbers are numbers
with only 2 factors, 1 and the number itself.
Now write these factors in least to greatest
multiplying them separate rows.
Circle factors they have in common.
Since 3 pairs of two's match up, multiply by 2 three times to get 8.
So the GCF is 8.