A coastline recedes at a rate of 3cm per year. How much of the coastline dissappears after 4 years?

Name each raycalculation tip: in ray "ab", a is the endpoint of the ray.

Choose the equation below that represents the line that passes through the point (2, 4) and has a slope of 3. a) y − 4 = 3(x − 2) b) y − 2 = 3(x − 4) c) y + 4 = 3(x + 2) d) y + 2 = 3(x + 4)

Plz hurry evaluate the expression a+b where a=8 and b=19