It says identity the zeros of the quadratic function & which equation matches the graph

Determine whether the set of whole numbers is closed under addition. explain why the set is or is not closed. give an example.

Solve with work both bert and ernie received an increase in their weekly salaries. bert's salary increased from $520 to $520. ernie's salary went from $580 to $645. find the percent of increase for each salary. what was the larger of the two percents ?

Christina can paint 420 square feet in 105 minutes. which unit rate describes the scenario?