Rathan thinks all factors of even numbers are even. which explains whether rathan is correct?

Rathan is incorrect.

Step-by-step explanation:

For a number X, the factors of the numer are other numbers that we multiplicate togheter to get the number X.

for example if X = 16, the factors of 16 can be:

2*8 = 16

4*4 = 16

etc.

Now, let's take some even numbers like 6 and 24.

Now, those two numbers have a factor in common.

3*2 = 6

3*8 = 24

both numbers have the same factor, 3, wich is an odd number. So we have found an example that says that Rathan is incorrect.

8(-10x+3.5y-7)

8×-10x + 8×3.5y + 8×-7

-80x + 28y - 56

therefore

-80x+28y-56 is the correct answer