For his science project, timor has 1 pea plant and 3 bean plants. he measures the heights of the plants once a week. this week's data are shown in the table. which expression will him find the average height of the bean plants this week? a) (10 + 12 + 11 + 20) ÷ 4 b) (12 + 11 + 20) × 3 c) (12 + 11 + 20) – 3 d) (12 + 11 + 20) ÷ 3

Anyone know? is appreciated! will mark brainliest if correct!

Lance lived in portugal and brazil for a total of 14 months to learn portuguese. he learned an average of 130 new words per month when he lived in portugal, and an average of 150 new words per month when he lived in brazil. in total he learned 1920 new words. write a system of equations to represent the situation. use x to represent portugal, and y to represent brazil

Recall that the owner of a local health food store recently started a new ad campaign to attract more business and wants to know if average daily sales have increased. historically average daily sales were approximately $2,700. the upper bound of the 95% range of likely sample means for this one-sided test is approximately $2,843.44. if the owner took a random sample of forty-five days and found that daily average sales were now $2,984, what can she conclude at the 95% confidence level?