What is the slope of the line that is perpendicular to the line whose equation is 3x + y = 4?
-3
-1/3
1/3
3

-1/3

Step-by-step explanation:

First step to determine what's the slope of a perpendicular is to know the slope of the line we're referring to.

What's the slope of 3x + y = 4?

The slope is given by the factor of the variable x... so in this case the slope is 3, which is a positive slope, the line is going up.

To have another line crossing that one with a 90 degrees angle, it would have to be with a negative slope.  

The slope angle would also to be inverted... so from 3 would go to 1/3.

In a shortcut, to find a perpendicular slope to m (the original slope), you do -1/m.

So the slope of the perpendicular would be -1/3.

step-by-step explanation:

there are 36 inches in a yard

25 : 36 = 0.69 yards (you can round to 0.70)