Erika’s teacher assigned her a project where she must perform a song using only instruments like those that existed during prehistoric times. Based on these guidelines, what should Erika use to MOST accurately represent this time period of music? A. her voice and a harp B. her voice and a guitar C. her voice and a piano D. her voice and a flute

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.

modernism is a 20th century movement