What did they rap about in the 1970s ??

hip-hop

The most common view that is seen, is that hip-hop is a cultural movement that emerged in the South Bronx in New York City during the 1970s, with MCing (or rapping) being one of the primary four elements.

Explanation:

Ice Ice Baby (Official Music Video) Vanilla Ice

Explanation:

Hip hop as both a musical genre and a culture was formed during the 1970s when block parties became increasingly popular in New York City, particularly among African American youth residing in the Bronx.

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.

franz marc (d) was an artist during the expressionist movement.