Simplify 6.4k + 2.8 – 0.75 + 1.8k.

Idon’t understand this.. will someone ? will mark brainliest along with 20 points.

Mike wants to make meatloaf. his recipe uses a total of 8 pounds of meat. if he uses a 3 to 1 ratio of beef to pork, how much pork will he use? enter your answer as a mixed number in simplest terms.

Given that (-2,-2) is on the graph of f(x) find the corresponding point for the function f(x)+5