Alberto tiene un engranaje que se acopla a otra pieza. Por estar hecho de un material especial, debe pulir la superficie entre los círculos. Los radios de los
círculos miden 2 cm y 3 cm. ¿Cuál es el área de la corona circular que debe
pulir?​

Aclass consists of 55% boys and 45% girls. it is observed that 25% of the class are boys and scored an a on the test, and 35% of the class are girls and scored an a on the test. if a student is chosen at random and is found to be a girl, the probability that the student scored an ais

Find the roots of the equation below. x^2 - 6 + 9 = 0

What is the expression in factored form? 225x^2 - 144 a. 9(5x+4)^2 b. 9(5x-4)^2 c. 9(4x+5)(4x-5) d. 9(5x+4)(5x-4)