Simplify the expressions by combining like terms

4r + 9r - 11r + 7r

Chandler was a caretaker at the state zoo. he noticed that the number of animals adopted by the zoo increased at a constant rate every year since 2010. which of the following graphs shows the slowest rate at which the animals in the zoo were adopted?

In the xy-plane, if the parabola with equation passes through the point (-1, -1), which of the following must be true?

[10 points, algebra 2]according to my answer key the restrictions are -1 and 4. but why not positive 1?