Fifty pounds of a cement and sand mixture is 40% sand. How many pounds of sand must be added for the resulting mixture to be 60% sand?

Kayla has a $500 budget for the school party.she paid $150 for the decorations.food will cost $5.50 per student. what inequality represents the number of students,s, that can attend the party?

Solve each equation using the quadratic formula. find the exact solutions. 6n^2 + 4n - 11

Which statements describe the solutions to the inequality x< -20 check all that apply. there are infinite solutions. each solution is negative. each solution is positive. the solutions are both positive and negative. the solutions contain only integer values. the solutions contain rational number values.