Can someone pls help me with this question.

Add the two expressions 3.8b - 7 and 2.9b + 9 enter your answer in simplified form

Aresearch study is done to find the average age of all u.s. factory workers. the researchers asked every factory worker in ohio what their birth year is. this research is an example of a census survey convenience sample simple random sample

Solve the inequality 47.75 + x 50 to determine how much more weight can be added to li's suitcase without going over the 50-pound limit. what is the solution set?