Jen Butler has been pricing Speed-Pass train fares for a group trip to New York. Three adults and four children must pay $109. Two adults and three children must pay $77. Find the price of the adult's ticket and the price of a child's ticket.

Me answer number 3plz explain how you do it

Add the two expressions 3.8b - 7 and 2.9b + 9 enter your answer in simplified form

1. writing an equation for an exponential function by 2. a piece of paper that is 0.6 millimeter thick is folded. write an equation for the thickness t of the paper in millimeters as a function of the number n of folds. the equation is t(n)= 3. enter an equation for the function that includes the points. (-2, 2/5) and (-1,2)