(19+23)-(4x50)
i need help! very confused

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

Steve wants to develop a way to find the total cost of any item including sales tax. the sales tax in his city is 6%. his friend jenna writes the expression x + 6x where x is the cost of the item. explain whether her expression is correct based on the situation.

If sec theta = 5/3 and the terminal point determined by theta is in quadrant 4, then