PLEASE HELP ASAP WILL GUVE BRAINLIEST PLEASEE

Step-by-step explanation:

For two lines to be perpendicular to each other the product of their slopes must be -1.

First we need the slope of the reference line. Since

y=mx+b, where m is the slope and the line we are given is

y=2x-4

So we know the slope is 2. So our perpendicular will satisfy

m1(m2)=-1

2m=-1

m= -1/2

So now our line is

y=-x/2+b, using point (0,-7)

-7=-0/2+b

-7=b, now we have the complete line

y=-x/2-7

(Or more neatly)

y=(-x-14)/2

lockers 1, 4, 9, 16, 25, 40, and 49 are open

i ran through it by the other answer is wrong