Answer:

Step-by-step explanation:
Factor the expression by first finding a GCF. Each term has the y variable and this can be pulled out as the GCF.

To further factor the expression break the polynomial into two binomials.
To factor into two binomials, find factors that multiply to -5 and add to -4.
-5 and 1 are factors and these make the binomials
.
The final factorization is 
The answer is B,because they each can be divided by three
Answer:
-6/15
Step-by-step explanation:
y2-y1/x1-y1
-1-5/8+-7=-6/15