Step-by-step explanation:
The scientific notation:

<em>1 ≤ a < 10</em> and <em>k -</em><em> any integer number</em>
<em />

X^2 + 3x - 6
This is because x^2 and 3x have nothing they can combine with, leaving them as their own number. 1 + - 6 will give you -5 as adding to a negative only reduces not adds entirely.
Hope this helps!
Answer
-1
Step-by-step explanation:
Just plug in the numbers.
Step-by-step explanation:
y=mx+b since 6 is the y intercept go up six and back -4 times each since it is the x intercept