Line ab intersects line df. which statement shows that the two lines are perpendicular?

a- line ab and line df are on the same plane.

b- line ab and line df intersect only once

c- line ab and line df intersect at a 90 angle

d- line ab and line df intersect at a 180 angle

choice b is correct

step-by-step explanation:

we have been given the following system of linear inequalities;

we are required to graphically determine the solution to these system of inequalities. using a graphing tool, the solution is as shown in the attachment below;

step-by-step explanation:

answer: $201

step-by-step explanation: to get the answer, you first get 3 nieces that he sold and multiply it by 67 and get $201, so he earned $201 selling his nieces.

me! what did you put for this question?

step-by-step explanation: