En las carreras de caballos un espectador apostó a tres de las carreras y los resultados fueron los siguientes: en la primera perdió 350 dólares, en la segunda perdió 600 dólares y en la tercera ganó 850 dólares. ¿ Cuánto dinero logró perder o ganar el espectador?

Scores on the cognitive scale of the bayley-scales of infant and toddler development range from 1 to 19, with a standard deviation of 3. calculate the margin of error in estimating the true mean cognitive scale score, with 99% confidence, if there are 12 infants and toddlers in a sample.

Aaron invested a total of $4,100, some in an account earning 8% simple interest, and the rest in an account earning 5% simple interest. how much did he invest in each account if after one year he earned $211 in interest? select one: a. $200 at 8%, $3,900 at 5% b. $3,200 at 8%, $900 at 5% c. $900 at 8%, $3,200 at 5% d. $3,900 at 8%, $200 at 5%

1/2+1/6-3/4 simplify the given expression leaving the answer in improper fraction form.