I = the square root of -1, so it would be 7i
Answer:

Step-by-step explanation:
Slope-intercept form is

Where <em>m</em> = slope,
and <em>b</em> = y-intercept.
The problem states that the slope is
, and it also states that one point on the line is the origin. (0, 0)
Because the origin crosses the y-axis at point 0, we know that the y-intercept is 0.
All that's left to do is plug these values into the slope formula.

We can then simplify the equation even more.

Answer:
y = 1/5x - 7
Step-by-step explanation:
The formula for the perimeter is 2L + 2W.
Since we know that L=10+W, we can substitute this into the equation.
2(10+W) +2W=124
20+2W + 2W=124
4W +20 = 124
4W=104
W=26
Therefore, the width is 26 inches.