Step-by-step explanation:
To cover a rectangular region of her yard, Penny needs at least 217 square feet of sod. The length of the region is 15.5 feet. What are the possible widths of the region?
L=length=15.5 ft; W=width; A=area=>217 sq ft
L*W=>217 sq ft Divide each side by L
W=>217 sq ft/L
W=>217 sq ft/15.5 ft=>14 feet
ANSWER: To cover at least 217 sq ft. the width must be at least 14 feet.
For this case we have to by definition:
If two lines are parallel then their slopes are equal.
If two lines are perpendicular then the product of their slopes is equal to -1.
We have the following equations:

We manipulate the equation to convert it into the slope-intersection form 
Where:
m: It's the slope
y: It is the cut-off point with the y axis.
So:

From the second equation given we have:

We manipulate:

It is observed that the slopes are equal, so the lines are parallel,
ANswer:
The lines are parallel.
<em>1/6 = 0.16 acres in 8 minutes. </em>
<em>--</em>
<em>0.16 ÷ 8 = 0.02 acres mowed in 1 minute.</em>
<em>--</em>
<em>(60 minutes in an hour)</em>
<em>0.02 x 60 = 1.2 acres mowed in an hour.</em>
<em>-- </em>
<em>1.2 is equal to 1 1/5, and jami needs to mow 1 1/2 acres.</em><em> so no, jami cannot mow 1 1/2 acres in an hour.</em>