2L + 2W = 28 feet
One blanket could be;
2(10) ft + 2(4) ft
The second blanket could be;
2(7) ft + 2(7) ft
Because...
2(10) + 2(4) = 20 + 8 = 28 and 2(7) + 2(7) =14 + 14 = 28
hope that helps :D
could you specify your question a bit more?
6 times x (the variable) plus 14 so basically 6x+14
For a line in the form:

In this case, for the line 2x + 10y = 20 with a=2 and b=10 the slope is:

Now, two lines are perpendiculars if the slopes satisfy the following equation:

So, for the line we want the slope is:

Finally, the line pass througth the point (2, 3) with slope m=5, so the equation is:

The equation of the line is y = 5x - 7
To answer the problem multiply the length, width, and height.
212 x 4 x 214= 181,472
The volume is 181,472 m³