Answer:

Step-by-step explanation:



#1.
Here what you do is cross multiply.

#2.
Same as #1, just cross multiply.

You get the gist?
Prime factorization of 160 = 2 x 2 x 2 x 2 x 2 x 5
Step-by-step explanation:
to work out gradient
change in y ÷ change in x
first lines gradient
(7 - - 8) ÷ (7 - 7) = 0
second lines gradient
(7 - 7) ÷ (9 - - 6) = 0