Which of these points is closest to the origin (0, 0)?

(9, -3)
(10, 2)
(-7, 5)
(8, 4)

Find the missing factor in exponential form 48^2=3^2 • ?

Complete the solution of the equation. find the value of y when x equals to 1 9x-5y=29

Last month, a 770 g box of cereal was sold at a grocery store for $3.10. however, this month, the cereal manufacturer launched the same cereal in a 640 g box, which is being sold at $2.50. what is the percent change in the unit price?