Please helppp?

Multiply −2x(6x^4−7x^2+x−5) express the answer in standard form. enter your answer in the box.

Pls! does anybody know a shortcut for answering these types of questions in the future?

This stem-and-leaf plot represents the heights of the students on ralph's basketball team. one student's height is missing from the plot. if the mean height of all the students on the team is 61 inches, what is the missing height? a. 55 in. b. 59 in. c. 61 in. d. 65 in.