2/3x + 5/6 = 1/4x? I’m sorry to waist y’alls time, these are fractions and I’m not the best at them. Could someone help?

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.

Robert has 78 tomatoes and 56 cucumbers he wants to plant them in equal rows how many in each row

Jody bought 20 shares of amazon at the close price of $121.00. she bought 20 more shares a year later at the price of $127.00. two years later, she sold all of her shares at the price of $133.00. her broker charges $50 for each transaction. after all of these transactions, how much money did jody make?