When should quotation marks be used? A. title of short works, title of long works, symbol for inches, direct quotation
B. title of short works, humor or irony, symbol for feet, direct quotations and paraphrasing
C. title of short works, strong emotion or emphasis, symbol for feet, indirect quotation
D. title of short works, some cases of humor or irony, symbol for inches, direct quotation

B. title of short works, humor or irony, symbol for feet, direct quotations and paraphrasing

Explanation:

coordinates of r(b,c)

slope of nm is 0.

step-by-step explanation:

the midpoint of the line joining the points (x₁,y₁) and (x₂,y₂) is given by

the midpoint of the line segment nk is given by

∴r(b,c)

the slope of the line joining the points (x₁,y₁) and (x₂,y₂) is given by

slope of rs is

hence

coordinates of r(b,c)

and slope of nm is 0.