One of the data values in the data set shown is missing.

71, 74, 84, 85, 77, 90, ?

Given that mean is not the best measure of center for the data set, which of these could be the missing value?

The surface area of the triangular prism is .

He ! a group of farmers planned to clean 80 acres of wheat per day to finish the work on schedule. right before the work started, they received a new piece of machinery that them clean 10 more acres per day than originally planned. as a result of increased productivity in the last day before the deadline they only had to clean 30 acres. how many acres of wheat did the group of farmers have to clean?

In a two-digit number the units' digit is 7 more than the tens' digit. the number with digits reversed is three times as large as the sum of the original number and the two digits. find the number.