Kevin asked his trainee, Anna, to help call some of his clients to sell a newly- issued municipal bond. If he had to call all of the clients himself, it would take Kevin 6 hours to complete the job. If Anna alone were to call the clients, it would take her 9 hours. Working together, how long will it take Kevin and Anna to call all of the clients? a.) 2.8 hours b.) 3.6 hours c.) 4.5 hours d.) 3.0 hours

Solve. \[ \sqrt{x-7}+\sqrt{x+8}=5 \] Select the correct choice below and, if necessary, fill in the answer box to complete your choice. A. The solution(s) is/are (Type an integer or a simplified fraction. Use a comma to separate answers as needed.) B. There is no solution.

Solve \( 2 a^{2}+13 a+20=0 \) by factoring. Enter answers separated by a comma. \( a=\square \) or \( a=\square \)

d) \( 7-3 y-7-3 y \)

138. In un parallelogrammo il perimetro è 166 cm e il lato maggiore supera di 7 c il triplo del minore. Calcola le misure dei [19 cm; 64

(1) La probabilidad de que a un diente nuevo le guste la MH es de 0,8 si llegan 5 clienles nuevos, ¿cual es la probabilidad de que solo a 2 de ellos les guste la MH?