Melanie sold half of her comic books and then bought 7 more. she now has 18. how many did she begin with?

she began with 22 comic books

18-7=11

11+11=22

x + 4/7

step-by-step explanation:

use cymath

for this case we have by definition, if two lines are perpendicular, then the product of their slopes is -1.

then, given the following line:

so,

we are looking for m_ {2}:

then, the line is given by:

we find "b" replacing the given point:

finally, the equation is:

option c