The ans is B (-1, -5)
Thus y +5=2(x+1)
Substitute (-1, -5) into the equation
-5 +5=2(-1+1)
0=0

Here, we want to get what Andre's mistake was and correct it
To answer this, we are supposed to use the division law of indices
We have this as;

Now, in the case of this question, x is 4 and y is -3
So, we have the expression as;

His mistake is thus adding the exponents instead of subtracting
C is a total of 90 degrees
You would use distribution. So, in this case, it would be 10a - 50. You use -10 to multiply -a and 5, and you get 10a, and -50.