Agregar a: resultados problemas desconocidos (dentro de 100)
  papá cocinó 25 pizzas grandes. luego cocinó 14 pizzas pequeñas. ¿cuántas pizzas cocinó papá en total?
una
    26 trenes llegan a la estación de tren. llegan 12 trenes más. ¿cuántos trenes hay en la estación de tren?
si
      un mono come 9 plátanos para el desayuno.
el mono come 14 plátanos más
para el almuerzo. ¿cuántas bananas come el mono?
do
  32 abejas vuelan a la colmena. 18 abejas más vuelan a la colmena. ¿cuántas abejas vuelan a la colmena

Which of the following lines is not parallel to the graph of y = 4x +7?

Determine the number of girls in a math class with 87 boys if there are 25 girls for every 75 boys

(20 points) a bank has been receiving complaints from real estate agents that their customers have been waiting too long for mortgage confirmations. the bank prides itself on its mortgage application process and decides to investigate the claims. the bank manager takes a random sample of 20 customers whose mortgage applications have been processed in the last 6 months and finds the following wait times (in days): 5, 7, 22, 4, 12, 9, 9, 14, 3, 6, 5, 15, 10, 17, 12, 10, 9, 4, 10, 13 assume that the random variable x measures the number of days a customer waits for mortgage processing at this bank, and assume that x is normally distributed. 2a. find the sample mean of this data (x ě…). 2b. find the sample variance of x. find the variance of x ě…. for (c), (d), and (e), use the appropriate t-distribution 2c. find the 90% confidence interval for the population mean (îľ). 2d. test the hypothesis that îľ is equal to 7 at the 95% confidence level. (should you do a one-tailed or two-tailed test here? ) 2e. what is the approximate p-value of this hypothesis?