Algebra-2

First, rearrange the equation of the second line 2x + 4y = 15 to slope-intercept form.

We get 4y = -2x + 15, and then y = (-1/2)x + 15/4. The slope of this line is -1/2.

For two lines to be perpendicular, the product of their slopes is -1.

The slope of the second line from 2x + 4y = 15 is -1/2.