8.4 x 10^2 (10 to the 2nd power) = 8.4 x 100 = 840
The answer is A. 840
Your y-intercept would be (0,-13)
Answer:

Step-by-step explanation:
The equation of any line in slope-intercept form is:
y=mx+b
Being m the slope and b the y-intercept.
Assume we know the line passes through points A(x1,y1) and B(x2,y2). The slope can be calculated with the equation:

Two points are given: (-6,4) and (-2,2). Calculating the slope:

The equation of the line is, so far:

To calculate the value of b, we use any of the given points, for example (-6,4):


Solving:
b = 1
The equation of the line is:

We can see none of the choices is correct.
Answer: He added 4 to a negative 42 and said it was 46 but its supposed to simplify to -38. X=3/5