A = -bcd

Not sure how I'm suppose to get the answer without dividing first.

-1/cd

b = -a/cd

Step-by-step explanation:

a = -bcd

Multiplication and division are inverse operations

Multiply each side by -1/cd

a* -1/cd = -bcd * -1/cd

-a /cd = b

2 over 5

step-by-step explanation:

the 2: 3 ratio is the length of the ac segment to the cb segment total length. this implies that the ratio between segment ac length and segment ab length is 2: 5. point c is 2/5 from a to b, so the required fraction is 2/5.

table 3 represents a direct variation function. : )