ONLY ANSWER QUESTIONS 11, 12, AND 13 PLEASE! ANSWER ASAP WILL GJVE BRAINLIEST

Select all expressions that are equivalent to 2(3x + 7y). question 1 options: 6x + 14y 6x + 7y 1(6x + 14y)

David and alton are training for a race. they spend 35 minutes stretching and then go on a 5 mile practice run. david runs at a pace of 7 min/mile. alton runs at a pace of 8 min/mile. write an equation for each runner that shows the total length of their workout. then solve each equation showing your work

Marcy is conducting a study regarding the amount of time students at her school spend talking to friends online. which group would give marcy the best results for her study?