Answer:
1) 
2) 
Step-by-step explanation:
1)

Subtract 15 from both sides

Divide both sides by 2




this shows that 10 is the right answer
2)

Add 3 to both sides

Divide both sides by 7




this shows that 3 is the right answer
Hope this helps
Answer:
They are all positive because you must go right.
They are all negative because you must go down.
Step-by-step explanation:
Example. (1,-4)
You go over one.
Down 4
Answer:
18x-15
Step-by-step explanation:
Find the standard form of the equation of the parabola with a focus at (-4, 0) and a directrix at x = 4.