Explain to a student the difference between equality and equivalence of sets

Solve the equation by completing the square. x^2+2x=17

Amanda went into the grocery business starting with five stores. after one year, she opened two more stores. after two years, she opened two more stores than the previous year. if amanda expands her grocery business following the same pattern, which of the following graphs represents the number of stores she will own over time?

What is the measure of sty in oo below? 130 310 230 50