Which complex number will be located above the real axis and to the left of the imaginary axis?

a) 4i
b) 2-4i
c) 4i-1
d) -1-2i

Kelly is a salesperson at a shoe store, where she must sell a pre-set number of pairs of shoes each month. at the end of each work day the number of pairs of shoes that she has left to sell that month is given by the equation s=300-15x , where s is the number of pair of shoes kelly still needs to sell and x is the number of days she has worked that month. what is the meaning of the number 300 in this equation

What is the difference between the equations of a vertical and a horizontal line?

Ade and abc are similar. which best explains why the slope of the line between points a and d is the same as the slope between points a and b?