[38 POINTS] Please explain how to do this.

What are “like terms”? why can we only add like terms?

In a survey of 1015 adults, a polling agency asked, "when you retire, do you think you will have enough money to live comfortably or not. of the 1015 surveyed, 534 stated that they were worried about having enough money to live comfortably in retirement. construct a 90% confidence interval for the proportion of adults who are worried about having enough money to live comfortably in retirement.

Simplify. 3(4+4x) (type your answer in with no spaces)