He comprado un cuaderno que costaba S/ 3.00 soles y para pagarlo he utilizado nueve monedas, unas de 20 céntimos y otras de 50 céntimos. ¿Cuántas monedas de cada clase he
utilizado?

Solve the system of equations. y= 2x y= x^2 - 15

Which of the following statements is not true? a. parallel lines are lines in the same plane that never intersect. b. congruent figures have the same shape and same size angles and sides. c. similar figures must have the same shape and the same size. d. a rotation is when you turn a figure around a certain point.

Since opening night, attendance at play a has increased steadily, while attendance at play b first rose and then fell. equations modeling the daily attendance y at each play are shown below, where x is the number of days since opening night. on what day(s) was the attendance the same at both plays? what was the attendance? play a: y = 8x + 191 play b: y = -x^2 + 26x + 126