Hannah's school hosted a book donation. there are 150 students at her school, and they donated a total of books! hannah donated 3 times as many as the average number of books each student donated. how many books did hannah donate? write your answer as an expression.

Lilianna uses 3/4 calories per minute just by sitting. she uses 1 more calorie per minute by walking. lilianna uses a total of 12 1/4 calories walking to the park. lilianna uses the equation, d(.75+1)=12.25 to represent the situation. what does the variable d represent in the equation?

Acircle has a radius of 5/6 units and is centered at (3.6, 7.8) write the equation of this circle

What is the solution set of the quadratic inequality x2- 5< 0? o {xl-55x55{x- 155x55){xl -55x5 15){x1 - 15 sx5/5)